Update: those of you looking to play with Android on Pi in advance of our source code release might want to check out the community Razdroid project, which last month produced its first non-accelerated port of Gingerbread on top of the publicly released VideoCore binary.
Naren has been working on a port of Android 4.0 (Ice Cream Sandwich) to Raspberry Pi, and as you can see from the screenshots and video below, he’s been making great progress. Hardware-accelerated graphics and video have been up and running smoothly for some time; AudioFlinger support is the only major missing piece at the moment.
This implementation uses a different kernel and VideoCore binary image from the one available on GitHub, which is why we’ve been keeping quiet about it so far. We’re investigating the feasibility of converging the two code lines to produce a single common platform as soon as we can, at which point we hope to release the sources for you to play with.