From some discussions during fosdem / on irc / on the mailinglist, based on the layout at rpmforge:
subversion layout
svnroot / rpms subdirs for each package like svnroot / rpms / aget containing files like aget.spec, aget-1.2.6-someproblem.patch
svnroot / people /
svnroot / tools subdirs for each tool, for example our own plague tree?
svnroot / web sources for websites
svnroot / docs needed? useful?