Wireless PDA workstation

[brian]

Ob content: I'd prefer if it ran linux...

Anyone have a good recommendation (or warning) in regards to a
decent,portable wireless PDA-esque device?  I was looking at some of the
Pocket PC-enabled phones at Verizon (current wireless provider), but
don't want to go that route if I can help it.  Basically what I'd like
to be able to do is get some sort of wireless (pref. cellular) web
browser access and terminal/ssh access so that I can do server admin
stuff from whereever I happen to be.  Reading email would also be nice. 
I don't need the "micro-office" apps, games, etc.  Some sort of ability
to support a standard Cisco VPN login qould be nice as well.

Thanks...