I'm on the UC board mostly, but I have IBS as well. I have heard fennel tea helps with bloating/gas. I have yet to try it though. Just read this tip recently and haven't found any yet. In the meantime, I take Gas-X, but that doesn't always help.
Diagnosed w/IBS: Oct. 2006
Diagnosed w/UC: Jan. 2007 (proctitis), July 2008 (pancolitis)
Canasa (helped the first flare when it was just proctitis); Rowasa enemas (did not help as the following colonoscopy confirmed pancolitis); Lialda ( 2 pills in the morning, 2 pills in the evening, soon to be 2 pills in the morning only once I'm off steriods); Prednisone; Protonix (only took while on prednisone); Remicade infusions, started at 5mg/kg, increased in March to 7.5mg/kg (started Aug 2008 - 6 infusions so far, next infusion on 4/30 continuing every 8 weeks); Zyrtec-D (for allergies); Toprol (a generic form, 25 mg, for a rapid heart rate)
Supplements: Women's One-a-day multi-vitamin; Super B-complex w/vitamin C,
Iron supplements, Omega-3 Fish Oil (coated, not sure how much except one soft-gel daily), Aloe Vera supplement (currently taking one daily, will increase to two soon)
Diet: Spinach and Sunflower seed butter diet (starting 3/22/09)
Current Status: Reached remission for a few weeks in October 2008, but symptoms returned after I allowed myself to enjoy wine again.... gave up wine and have not been in full remission again yet.