I've switched MT from running under mod_fastcgi to run under mod_fcgid, as MT seems to get 'confused' (and leak memory) after running for a while and I don't see a mod_fastcgi option to restart things run as FastCGIServers. (mod_fcgid defaults to restarting things on occasion and has a knob that allows me to tweak it).
mod_fastcgi stays around to run the WebObjects adaptor, for now at least, though.
So far, things are looking good, but as usual, let me know if you notice any problems.
Update: I switched things back to mod_fastcgi as fcgid seemed to have a problem with how MT does image uploads.
