I grew up around Omaha and was a Creighton fan before I became an ISU fan, so the Jays are still my #2 team (but I don't care as much now that Altman is gone and McD is there). I usually cheer for both Drake and UNI as well to support the in-state teams. The only conference opponent in basketball that I can stand to cheer for is Oklahoma State. I'd love to go to a game at Gallagher-Iba someday.
As for other major conferences, I'm cheering for Oregon in the Pac10 now that Altman is there. I cheer for Vandy in the SEC, mostly because I love their strange court set-up. I don't really care about the Big 10, but I've started to like Illinois. I always love watching any Big East game, and Louisville is probably my favorite team from that conference.