Yes, and a few days early no less. Apple has begun updating the iTunes App store to include new iPad apps that will surely make it easy to pick out some apps and have them ready to go by Thursday. The App pages as of right now can only be opened from within iTunes and presumably the iPad itself.
What this little preview allows us to see is the pricing and descriptions of the apps that will be available once you fire up that iPad on Saturday. I have attached a few images below showing how the pages look from within iTunes.