Before you invest in new iPad apps you might want to take a look at your existing iPhone apps by running them on the iPad. Several seem to work better on X2 (a button on the right side of the machine) on the iPad than as a native iPad application.
A particular interesting version of this problem, that costs $2.99, is the Facebook app for iPad. This version is clunky and not terribly useful. Then again I should have been warned since it gets all of one star on iTunes. The iPhone version is far more user friendly and is easier to type on. Oh yes, and one more thing — the Facebook app for the iPhone is free. It's a bit nonsensical that the paid version is less useful than the free one, but that seems to be the case.
Considering the lack of access to the iPad for most developers, it's not surprising there are some minor problems with new apps. We can assume there are going to be a rush of updates in the next few days for all the apps. I am sure people are finding all sorts of problems not envisioned originally. Needless to say, it's impressive that there are so many available at launch and it's probably very helpful that most iPhone/iPod Touch apps will run on the iPad in some form or another.
A few other apps have their problems — like not working at all — most notably the WordPress app for the iPad. I am slowly working through my apps to see which ones work better, the iPhone or the iPad edition.
I am sure that many apps will be improved over the next weeks and months. It will be interesting to see how they evolve over the next six months to meet the needs of the users.