It appears that Apple has just flipped the switch and pushed all the approved iPad apps in the App Store live. There are hundreds of them — 11 pages worth. You can find a full list of them here.
And yes, you can even buy them now — of course, they won’t work unless you have an iPad, which no one outside of select few people will have until Saturday morning.
Apple also has it’s regular app lists ready for the iPad. For example, here’s a list of the top iPad apps in terms of revenue. You’ll notice that the top three are all Apple apps.