I had a Palm Pixi through Sprint but after just over a year it decided to stop charging. I bit the bullet and upgraded to an HTC Evo 4G.
The coolest thing about this phone is the WiFi hotspot feature. I can flip that on and connect my laptop to the Internet via WiFi. It's amazing the weird looks I get when I'm at Fazoli's surfing the net and you can hear people whisper "Do they have WiFi here?"
Being in the IT support/Consulting role it's nice being able to have Internet access anywhere I have a cell signal. Makes looking up information, downloading patches or software, and finding parts a lot easier.
Another cool thing I can do is I can access computers remotely. As in manipulate the desktop remotely. If one of my customers calls me while I'm on the road and tells me they're having an issue with a box I can bring it up on my phone and take a look at exactly what's going on.
It's slick, it's speedy, and it does everything I need it to do. Most of the time I don't lug my laptop with me.