Ive had an HTC tytn II phone for a while and recently ive started to realize that it makes a decent all in one device once I put an 8 gig micro SD card in it..
3 MP camera
Garmin Mobile XT
MS Office
Wi-Fi
Skype
Now Ive started dumping some of my more prefered music on the phone.

I have always thought of all in ones as a compromise, but my it does a good job.

Anyway, what else would be a good addition to a Windows Mobile Device?