We bought 2, a 32gb 3G and a 64gb wifi with Camera Pack.
I'm loving it, and today after one of our clients busted their 2 node Hyper-V cluster our guru used his to RDP in from holiday in Taipei and fixed it!
I think I have just about got everything I need installed now,
QuickOffice - edit Office Docs and save directly to cloud storage.
Scany - TCP/IP Scanning tools
ITap - RDP
I use L2TP VPN to the office Sonicwall NSA where I have a dedicated Win7 VM on the Hyper-V server with all of the system tools installed including Solarwinds and Orion Toolkits.
Slingplayer Mobile - connects to dedicated Slingboxes so I can watch the Live Matchday Streams we have access to.
Airvideo - this connects to the server App installed on my Windows Home Server and SAN
Traffic TV - never leave home without checking it first.
London Bus - Tube Status for when Im working in town.
ISip - Softphone
that best thing i've seen on an ipad (it's not an application but it might amuse you) is velco.
I come across it on stumble.. some guy attached two strips of strong velco to the back of the ipad, and then the other side on a wall, dashboard of a car, back of a car headrest, motorbike fuel tank and a ceiling. This way you can use the ipad conveniently as a digital picture frame, GPS / Satnav, in car entertainment or stare at it when your lying in bed.
I thought it was genius.
Unfortunately I didn't make a note of the link so I can't find it again