That's the one in their Midgard setting, right? It is pretty decent. Not quite what I want out of a gnoll race, but pretty good. Honestly though, if I find myself needing a PC gnoll race, I'll probably just brew up my own based on the 4e gnoll.
There's a fan-made Nentir Vale Gazetteer out there on the internet that's pretty thorough.I wish there was hope for a compiled book of all the 4e Nentir Vale lore. I mean, you could fill a tome with it, no problem.