After fighting a bit with apache2, I gave up (for now) on installing it on geeklair.
IPv6 support will have to wait until it works a little better (mainly I was having issues getting mod_perl2 or fastcgi working which I need for rt).
In any event, as a consolation prize, I've installed mod_perl on the apache 1.3 that is currently running. I've also updated the config to run movabletype under mod_perl and rebuilt all of the geeklair weblogs so that they reference the mod_perl'd scripts instead of the cgi ones.
So, you'll have to modify your bookmarklet if you are using one (substitute /mt/app for /cgi-bin/mt.cgi).
Otherwise, let me know if you notice any problems.
I'm just noticing that things are faster (although for a while it wasn't noticeable because Jason was mailbombing me ;-) ).