The iPaq HW6500/6700 is coming out in April according to HP. I talked to someone at T-Mobile and she said she was pretty sure they would not be getting it in April because she would have known by now. Not sure what that means exactly. Could I get the phone from HP and just pop in my tmob SIM card and it would work? Or will I have to wait?
The phone has great stats, but I’m afraid it’s gonna break the bank. Check out the radios–you have bluetooth, wifi (on the 6700), GSM, GPRS, GPS, and I think you can control the Hubble Telescope with it. 
CPU is reported to be faster than the H6300. Rumors on the net were that it might not have bluetooth but I have independently confirmed that it does.
More details: 3GSM World Congress 2005 coverage: photo review: iPaq Mobile Messenger h6500
### Update 2005-03-19 ###
I missed a radio, it has EDGE as well. Also, the length and width is almost precisely that of my H4155, but 21mm deep, as opposed to 12.7mm.
Does Psi work on Windows CE?
Windows CE? We are on Windows Mobile 2003 Second Edition Phone Edition now, boy!
Umm, the answer is no.
A while ago, mblsha did think about making it work on qtopia, but I think it would end up being a total rewrite.