So after having used the 5D2 for some time, what do I think? It's really nice, coming from a 40D up to that. It's basically a doubling I figured out, roughly twice as large sensor with twice as many megapixels. Besides that, the controls are practically the same. The files are large and beautiful, can't wait to print something large-ish from one.
Something else relatively new is the Elinchrom D-lite 4, which quickly has become my go-to light for indoor things. The accompanying Portalite softbox is pretty easy to use and gives nice, directional light.