I got a iPad 16GB WiFi in San Fransisco this summer, so the first steps was:
Step 1, Jailbreaking
Jailbreak it: http://spiritjb.com/
Step 2, Set root password
Default root passord is ‘alpine’. The regular user ‘mobile’ has the same passord. Change these.
Step 3, The best software
AirVideo – lets you stream movies from any pc/mac. On-the-fly converting. A #1 purchase.
iTap RDP – RDP client XBMC – remote control XBMC
Angry Birds HD – The best game for iPad so far
Step 4, Accessorize