On this note we are actually intentionally not releasing additional class descriptions and lore pieces regarding specific classes. The class list is still subject to additions, subtractions, and transmogrifications (sp!).
Don't expect specific class lore for some time to come. We would rather keep fairly tight lipped on a lot of this stuff for the moment. There are a few reasons for this.
1. More information to release over time, on the official site and to affiliate websites.
2. Certain elements of the classes are subject to change during beta.