i've invested some time looking into tools keeping repos in sync, chosed this: http://www.darcs.net/DarcsWiki/Tailor
for now the darcs repo is at: http://common-lisp.net/project/cl-wdim/darcs/slime/ and will also show up tomorrow at: http://common-lisp.net/cgi-bin/darcsweb/darcsweb.cgi
to get it without the extensive patch history (advised, darcsweb is there for looking into the past):
darcs get --partial http://common-lisp.net/project/cl-wdim/darcs/slime/
this repo contains all my changes that are missing from cvs head and i'll also try to keep this repo in sync with cvs head, but it would be much better to move it under /project/slime and use darcs. but again, it's up to the dictator who has still not shown up.
heh, give me write permission to slime and you won't miss him anymore... :)
anyway, the links are there, use them as you like.