Justin Angel, a former Microsoft Silverlight Program Manager, who's now working for Vertigo, has yesterday posted a collage of what he calls a collection "of all current testing Windows Phone 7 Marketplace application icons and names". And while I have my doubts that these 32 applications are everything the Windows Phone 7 Marketplace has to offer at launch, it's quite interesting to see what's in the pipeline. First of all we have a couple of well known brand names like a YouTube, The New York Times and Yelp. But also interesting is how some of the application seems to plug-in to Windows Phone 7. For instance YouTube and LitePlayerLauncher are mentioned as MusicHub Add-Ons.

This means they will get a way deeper and more native integration into the whole Windows Phone 7 UI than just being third party applications.
Again, I don't expect that this is the full collection of currently available Windows Phone 7 applications but it might be the stuff, Vertigo is currently working on for customers.
Cheers ~ Arne