Hm, so, what's up with all of the other staging drivers, and why have they not had any development? What is the status of them? They are now on the short list to be deleted in 2 kernel releases, unless some real development happens on them.
This means, unless someone steps up and starts doing real work (not trivial spelling fixes) on the following drivers, they will be removed in the future kernel releases.
hv - Microsoft Hyper V drivers. The developers again seem to have disappeared, this is getting old. Slated for removal in 2.6.35