I like it, a good start at least. I'm curious to read about all the different cultures. Seems though you're going with a traditional top 3 to start. Big human empire, The dieing Elven empire and the reclusive dwarves. Not that it's a bad thing but it's okay to start. Big thumps up on how Devas work, that's an awesome concept. I love it. I like how you added in the Tiefling empire but lumping all the 'other' races into a 'Monster empire' is sort of odd. I'll admit, with D&D 4e, there are just way too many damn races sometimes. Adding them in to any campaign can be rather problematic so I can see you've taken a bit of a 'and here's the mixing pot' approach to dealing with one off race/class options. (You're a Goblin Bard? Okay fine, you're from here...)
The interesting concept will be if anyone wants to play an Eladrin female. How is that going to work?
Over all, I really am looking forward to this new product. It looks rather awesome, I must say and I think it's going to keep me subscribed to the site for many months to come.