Evernote I'm an evernote fan but I was stunned with this slick interpretation. I use it everytime I have the ipad open. Notes, meetings, ideas, and much more.
2Do: Tasks Done in Style You really get what you pay for and while 2do had a brilliant iPhone UI the iPad is even better. It's is a production desktop of tasks and projects. Beautiful and easy to use. Worth every red cent.
Calvetica Calendar If your calendar fell in love with a beautiful Swiss lady this would be the result. Best Calendar app interface you've ever seen. Clean but allows for lots of data to be readily visible.
Reeder for iPad Whether its news or the latest blog posts if you rely on RSS feeds to stay informed this Reeder is a necessity. Amazing interface.
Zite There are several of these on the market but this one is free and very well done.