Who would be interested in a pbp(play by post) 4e game? It will be slow and long as I mentioned previously. I will be looking for up to date tools to express the complicated minature actions online.
On a completely unrelated note, 4e is very videogame-like meaning it might actually work well for my crazy and impossible idea to create a FFXI DnD varient. Biggest problems I could see(outside of the obvious loads of work) is the way classes are set up to completely unique. This is kind of an issue when making a class for all 20 jobs(I could simple combine a few, but that might soil some of the flavor of certain jobs). I've actually grown to like how 4e handles monsters and makes want to complete the project just to see a Blue Mage in action.
EDIT: Also, fan-made errata for core books
http://www.enworld.org/showthread.php?t=229723