To be honest, I've been pleasantly surprised at the iPad apps. While there aren't as many excellent free apps compared to the iPhone apps, the paid iPad apps are quite good.
I think there is a decent range, but I have quite high standards, so only paid apps which do the job for me, with about 3.5 or 4 stars or higher, so far, are worth considering.
I have bought Penultimate, Note Taker HD ~ these to be used with Pogo stylus; Zinio is decent for browsing (haven't bought any magazines yet, just looking through samples); Monkey Island 2 SE for iPad; Qvik Sketch; Deliveries; Evernote(this is free, I recommend it); NightStand HD; Tuner; Clock Pro HD.
iPad is really revolutionary, I'm sure developers are coming to grips with what you can really do with it. Keep your hopes up...!