A very interesting hardware hack on the Mac mini, to build a Debian server powered by Li-ion batteries. This could be the core of a classroom network running thin clients, or an office network, especially outside Mumbai.

http://www.home.earthlink.net/~silasb/macbat/

Incidentally, while on the subject, I read that the installation of choice for PowerPC is Yellow Dog Linux (http://www.yellowdoglinux.com/).