I would try upping your Lialda first; four per day is the maximum dose. Also, if you're not using rectal meds daily, you should be. If you don't want to do that, then usually something like 6mp or Imuran is next. However, some docs are going ahead and "skipping" to Remicade after 5ASAs fail. There is some research to suggest that the long term outcome is better by doing that.
Status: Remission since late May 2009!
Symptoms began in November 2008, ~4 weeks after giving birth to my son.
Eased for ~3 weeks in December, possibly b/c of probiotic use?
Returned in January 2009 (with a vengeance), diagnosed with pancolitis on January 30.
Currently taking Asacol (400mg 4 pills 3x daily), Rowasa twice weekly, Culturelle probiotic, and Zoloft (25 mg).