I'm probably switching to an Evo. The price hike on the ETF fees on At&t smart phones is the straw that broke the camels back for me.
The Evo looks like a winner, and Sprint's rates are better than At&t's, and the Sprint service where I am is great. I'm on the outskirts of WiMax so hopefully when they expand that service I'll be in the blue.
Plus that mobile hotspot feature in Android 2.2 will be awesome to use with the iPad. I won't pay for the sprint version, but with all the different Android builds out there, I'm sure someone will port a stock 2.2 for the Evo that will have the hotspot feature activated.