I've got a blackberry.

I'm becoming a complete snob about movies and will only watch things with very high reviews, so I have the Flixter App to be able to check RottenTomatoes.

I also installed an app to scan barcodes ("ScanLife") and get product details. Used it once since getting it a month ago; seems that it could be handy on occasion.

I have yet to find a good free book reader for the blackberry, unforunately.

Just got an iPad for x-mas so will definitely stay tuned to this thread.