Why doesn the DeSmuME team release pre-build SVN binaries ?
Because the DeSmuME team doesn’t have trusted people to make the builds, and don’t want to get involved on builds that could include whatever the author wants. Every newbie coder could do a version that, after 10 minutes of gameplay, for example, starts corrupting stuff from the hard disk. Also, anyone incapable of building it’s own builds, probably isn’t very helpful for submitting bug reports or helping the development team on SVN releases, so there isn’t much point on them getting a SVN build.