Just for all the people looking for newer rtsp kernel patches. If not otherwise noted the latest patch always works with kernel versions >= its own version. Right now 2.6.26 which is the latest works with kernels all the way up to the 2.6.32-rc series.
Quick update on the RTSP front. I put the source online on github in the hope that more people will work on it. There are one or two bugs open I cannot fix myself so help is appreciated. So if you know the netfilter code head over to github and help out.