Quake 3 has been ported to Android. It looks slick, too (see video demo below). The project is called “kwaak3” and is based on Quake 3 ports to the iPhone and Nokia N900. The developer got everything up and running on a Motorola Milestone (a GSM Motorola Droid with multi-touch, basically) and makes use of the phone’s keyboard, “so it won’t work on your Nexus One or other phone at this point,” according to the project page.