I had the chance to play around with one of these last night and it's a really nice device.  The HP Ipaq 900 is a Windows Mobile 6.1 device with tri-band UMTS/HSDPA and quad-band GSM/GPRS/EDGE.  It has built in GPS and a 3 Mega-Pixel Camera. 

The device will be available Worldwide - starting shipping June 30th!

You can get more details HERE