I fully intend on trying Foundry content. I love the idea that players can create content for other players. It's one of the things I think sets Neverwinter apart form other MMOs and it truly reflects the spirit of D&D.
http://www.youtube.com/watch?v=TGbGltNr8lo&list=UUsIghHd1VyG2TEjIKCRU2gw&index=4 My favorite because it's the class I'm most looking forward to at launch.
My plans for beta weekends are to try a little bit of everything. Test out all the different classes available and really see what the game has to offer.