Pandora Radio I thought I knew a lot of artists, until I started using Pandora. My favorite music app, primarily because the playlists it creates have opened the door to tons of artists in genres I already know I'll like. (Free)
Pages For only $10, you get a really solid word processing program. Try that with Word. Add a keyboard, and you might never go back to the desktop. ($9.99)
Hipstamatic The only drawback to Hipstamatic is that there are so many film/lens/flash combinations possible, it is tough to remember what each combo will do. Lag time waiting on images to process aside, this thing just takes BEAUTIFUL pictures. ($.99)
Weather HD - Live Weather Forecast with 3D NOAA Radar Nothing may be less glamorous than weather forecasts. However, this one displays really beautiful and relaxing videos based upon the current or forecasted weather. Great to just leave on a stand on your desk when you're not using the iPad. The Christmas Edition includes images that can be turned off (or not) after the holidays. ($.99)
AirAttack HD Addictive and easy to learn game that lets you get some WWII payback. My 7-year old loves this game almost as much as I do. ($.99)
Ovenbreak--Infinity If you think a gingerbread man running, jumping, ducking, and swinging sounds a great game, you're not delusional. Very addictive, easy-to-learn, hard-to-master. ($.99)
Pano Pano is a really slick tool that lets you create near-perfect panoramic shots with the iPhone or iPod camera. It ($2.99)
Dragon Dictation Nothing fancy here, really, but I have found this to be invaluable, particularly when speaking is more appropriate than texting (such as when driving). The speech-to-text is surprisingly accurate, even with a Texas accent, and even mistakes are close enough to make sense. (Free)
Shazam An oldie but a goodie. I still break this one out a few times a month to ID that great, old song playing on the radio, so I can save it for purchase later in iTunes. (Free)
Qik Live If you have a need to be watched (or just want to share a cool moment), you should try this app. Qik was one of the first websites to use smart phones to broadcast live video, and it's still a great resource. (Free)