After three whole days with a new iPad, here's my three.
Context switching button that will switch thru the open apps and allow their graceful termination with a master "kill them all" function.
Drag & drop file manager that allows me to move things ( all things ) back & forth from a host machine.
Full featured email client that will accomodate multiple servers, multiple concurrant identities, allow folder manipulation on servers just like the big kids...
and a bonus fourth wish for the ability to backup the whole iToy onto a disc image somewhere under my control, update it incrementally,
save past versions if desired and be able to pull out individual files without having to perform unspeakable rituals in the Crossroads at midnight.