You know when you (used to) go down to the video rental store and they had a section of the wall dedicated to the store's "staff picks?" Apple has a similar section of Staff Picks for the App Store that's a good place to start looking for high-quality apps for your iPhone or iPod touch.
Have you ever caught yourself pausing and rewinding the DVR during Apple's "there's an app for that" commercials just so you could catch the name of a cool app that was demoed? No? Ok, I need to get out of the house more. Anyway, Apple maintains a list of all the apps that it has featured on one of its iPhone television commercials.
I noticed it in a tiny link at the bottom of the TV commercials page:
Clicking on the link takes you to this page, which takes you to an iTunes pages chock full of every app that Apple has featured in a television commercial, including TripCase, New York Subway 09 and Epicurious.
Great! There goes the budget!
Update: Apple also maintains a page of all the games in its television commercials.