Double sided tape is a great solution to emergency pants hemming, like istemi mentions. I've even used gaff in a pinch. Really. (Just remember to take it off before sending to the cleaner's, where they can probably put in a real hem anyway if you talk to them.)

I liked the suits selection recently at the Filene's Basement in Newton, down near the UDoIt. They even had a bunch of petite's stuff.

I still get my button-down blouses at places like Sears.