i've never really played around with one, but the blackberry from research in motion sounds quite impressive. and the company appears to be doing well, too. the initial designer of the palm did an amazing job in designing its pim functionality, because he focused very narrowly on that. the rim folks apparently did the same for wireless email. but that's why palm's wireless email isn't as good as rim's, and rim's pim functionality isn't as good as palm's.