Present Titles:

Card Captor Sakura (CLAMP) - running monthly, though after volume 6, collections will be unflipped and carry the subtitle Master of the Clow, and be numbered 1-6 themselves, six collected volumes available, four volumes MoC available
Peach Girl (Miwa Ueda) - ran monthly in Smile to April 2002, now coming out in graphic novel form only, though after volume 8, collections will be unflipped and carry the subtitle Change of Heart, and be numbered 1, 2, 3, and so on, themselves, eight collected volumes available, one volume CoH available
Miracle Girls (Nami Akimoto) - ran monthly to May 2002, now supposed to finish as GNs, eight collected volumes available
MARS (Fuyumi Soryo) - ran monthly in Smile, now coming out in graphic novel form only, nine collected volumes available
Planet Ladder (Yuri Narushima) - ran monthly in Smile, now coming out in graphic novel form only, five collected volumes available
Dragon Knights (Mineko Ohkami) - ran monthly for six issues from October 2001 to March 2002, now coming out graphic novel form only, seven collected volumes available
Marmalade Boy (Wataru Yoshizumi) - ran monthly for five issues from December 2001 to April 2002, now will come out graphic novel form only, six collected volumes available
Paradise Kiss (Ai Yazawa) - ran monthly in Smile, now coming out in graphic novel form only, four collected volumes available
Kodocha - Sana's Stage [Kodomo no Omocha] (Miho Obana) - ran monthly for five issues from December 2001, now will come out graphic novel form only, six collected volumes available
Karekano : His and Her Circumstances [Kareshi Kanojou no Jijou] (Masami Tsuda) - First volume ACTUALLY came out January 2003, two collected volumes available.
Tokyo Mew Mew (Reiko Yoshida) - coming out in graphic novel form as of April 2003, one volume available.
Cowboy Bebop : Shooting Star (Cain Yuga w/Sunrise) - coming out in graphic novel form as of April 2003, one volume available.
Happy Mania (Moyoko Anno) - a josei title, coming out in graphic novel form as of April 2003, one volume available.

Past Titles:

[Bishoujo Senshi] Sailor Moon (Naoko Takeuchi) - ran as both Sailor Moon and Sailor Moon StarS. Sailor Moon (covering the first three storylines) ran in Mixxine, then ran monthly in its own book. Eleven collected volumes available. SuperS (the fourth storyline) ran in Smile, four collected volumes available, StarS (the fifth storyline) also ran in Smile, three collected volumes available. This makes all eighteen volumes of the series available in English.
Magic Knight Rayearth (CLAMP) - ran in Mixxine/Tokyopop magazine, all three collected volumes available. Now being re-released under the 100% line in set starting in November 2002.
Magic Knight Rayearth [2] (CLAMP) - ran in Tokyopop magazine, until it stopped publication, then released in graphic novel form, all three collected volumes available
Clover (CLAMP) - ran monthly in Smile till July 2001, afterwards was released in graphic novel form only, all four collected volumes available (technically CLAMP considers Clover to be unfinished . . .)
[Kakutou Musume] Juline (Narumi Kakinouchi) - ran monthly in Smile till November 2001, then switched to graphic novel form for remaining volumes, all five collected volumes available
Cowboy Bebop (Yutaka Nanten w/Sunrise) - ran for four issues, now will come out graphic novel form only, all three collected volumes available
Corrector Yui (Keiko Okamoto, based on work by Kia Asamiya) - ran monthly for four issues till December 2001, then came out in graphic novel form only, all five collected volumes available
[Kaitou] Saint Tail (Megumi Tachikawa) - ran monthly to May 2002, then to finished as GNs, all seven collected volumes available
Wish (CLAMP) - came out in graphic novel form, all four collected volumes available

Future Titles:

Shirahime Syo: Snow Goddess Tales [Shirahimeshou] (CLAMP) - Late 2003
FAKE (Sanami Matoh) - May 2003
Gravitation (Maki Murakami) - June 2003
Pet Shop of Horrors (Akino Matsuri ) - June 2003
Wild Act (Rie Takada) - July 2003
Zodiac P.I.  [Junikyu de Tsukamaete] (Natsumu Ando) - July 2003
Between the Sheets (Erica Sakurazawa)  - May 2003
Angel (Erica Sakurazawa)  - July 2003
Angel Nest (Erica Sakurazawa)  - September 2003
Rule of Love (Erica Sakurazawa)  - 2003
The Aromatic Bitters (Erica Sakurazawa) - 2003/4
Nothing But Loving You (Erica Sakurazawa) - 2003/4
Vampire Game [Kyuuketsu Yuugi] (Judal) - May 2003
Forbidden Dance [Tenshi no Kiss] (Hinako Ashihara) - August 2003
Confidential Confessions [Memai, Namida, and Tobira] (Reiko Momochi) July 2003
X-Day (Author unclear) - August 2003

History

Mixx Publications (AKA Tokyopop) has had a storied history with publishing shoujo titles.  Initially praised for their daring manga anthology Mixxine which combined such popular shoujo fare such as Sailor Moon and Magic Knights Rayearth with shounen titles like Parasyte, they quickly lost fans with their over-localizations, decision to use the DIC names for the characters in Sailor Moon and "kewl" language.  Their infamous reputation reached new lows with the almost completely unannounced decision to pull Sailor Moon from the anthology and make it its own comic book.

Recently they appear to have turned over a new leaf, with their shoujo anthology Smile and a great decline in spelling and grammatical errors.  Characters are for the most part keeping their original names and in my opinion, claims that the have "destroyed the artwork" are greatly exaggerated.  They still have problems but have a greater commitment to shoujo manga than any other company.  It makes up the majority of their publications.  Their titles are predominantly Kodansha titles, with a heavy dose of Nakayoshi.  They also publish the manga for girl-fave series Gundam Wing.

Addendum : They have since lost a lot of respect for changing almost all the names in Miracle Girls.  Apparently, there is only so much they can do!

As of today (27th of May. 2001) this company is officially scaring me.  These last few licenses have been nothing less than stunning, let's hope they pan out.