I'm now on day 3 with the Audiovox PPC-6601 from Sprint.  Overall, I think I made the right decision.  The screen is very nice, and seems to be more clear and have better contrast than my Viewsonic V37.  I think the keypad on the Treo 650 is better, but the slide-out keypad on the 6601 in exchange for more screen real estate is definitely a plus.

Exchange ActiveSync works like a champ, and I also have a POP3 account set up.  It's so cool to be driving down the Interstate, receiving and reading new e-mails, all the while oblivious to other drivers honking and careening out of the way.

You definitely need a headset for making & taking calls.  The phone is just a little too big to feel comfortable next to your face.  I feel silly every time I make a call in a public place.  Plus, there's the greasy smears and dusting of beard crust on the screen when I'm through.  I suspect even if you've just scrubbed your face with Noxzema (which I apparently need), you're going to leave smears on the screen.  The included stereo earbuds and microphone work very well.  Man, I gotta start cleaning my ears, too.

Speaking of earbuds, I loaded up a few MP3s.  It works, but the sound quality leaves a little to be desired. 

I was disappointed that the battery only lasted 9 hours yesterday.  Of course, I had used it quite a bit making calls, surfing the Internet, and letting my co-workers handle it.  I definitely need to get another cradle for the house, or at least a charger.  Unfortunately, I've had a hard time finding accessories.

My next goal is to try out the bluetooth support.  From what I've read, it's possible to use the phone as a modem.  May laptop doesn't have bluetooth, so I need to buy a USB adapter.  I'd also like to try one of those bluetooth headsets.

The phone has locked up on me a few times, requiring a reset.  That disturbs me.  I'm also a little bummed out that it doesn't have a built-in camera.  I guess you get what you pay for.  Hey... wait a minute!

 Update: Here's a picture.