Winter Break gives me a lot of time to do absolutely nothing, and I finally configured a cross-compiler for MinGW on my Gentoo box, so my work on compiling stuff for MinGW will resume. I think I'm going to make some custom ebuilds for all this stuff, because there's a lot of repetition within all the
./configure && make all install stuff.
Details: Overlay (in subversion?), putting all ebuilds in the category dev-xmingw. Also have eclasses that do stuff like split-debug and handle all the common functionality.
Something else I should consider is a cron job that dumps the bzip2'ed overlay to my webspace. That shouldn't be too hard.