IB does oddlots now. I didn't know they didn't do them... I'm only with them since February. You can even short an oddlot! I had SUNW with an extra 45 and did a sell and click, sold 100, put me short 55 shares! Was just as easy to cover the 55 shares as it was to have me go short (and if I waited another 20 mins, I'd have even made more!).
I think IB gives interest for over 10,000, no? I think that's what I read... I just got over 10K yesterday with wired in funds. Guess I'll see how that works, next month.