Someone always asks this lol.. I say go for it. The only phone worth waiting for is the Evo Shift, and that's IF you're even interested in a phone with a keyboard. Other than that, it'll be a few months before the "next best thing" comes to Sprint.
Take it from hatchettjack the most diehard Palm Pre supporter. Go for it its an awesome phone. Get the Evo and enjoy it now because you may not be here tomorrow.