[gentoo-user] Installing outside of Portage & cruft removal

[Grant]

I'd like to install the latest miro from their nightlies and that
means installing manually without an ebuild.  I've always avoided this
because I don't want files spread across my system without an easy way
to remove them.  I've also always wanted to set up a good cruft
removal script for keeping my system clean (I'll admit that takes me
in the hobbyist direction) and I'm thinking the two might work well
together.  I could temporarily install apps without an ebuild and use
a cruft removal script to remove them.

What do you guys think of this?  Do you know of a good cruft removal script?

- Grant