Is there an Android port for the Raspberry Pi, and if so, where can I find out more about it?
It is technically possible, at least the earlier versions that are not so CPU and RAM-intensive. The question you should be asking yourself though is do you really want that? Android is pretty much a closed platform with a nice Java framework as a redeeming quality. Also it is very mobile and touch-centered, so your user experience will be lower unless you extend your Raspberry.
Eben recently posted on the Foundation's website announcing that Android 4.0 (Ice Cream Sandwich) is coming to Raspberry Pi!
Eben described the status as
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.
- Blog Post: Android 4.0 is coming!
As answered by Tibor, a port is obviously possible. Other than a decent Java framework, I believe there are quite a few lightweight (yet useful) Android apps that can lend enough motivation for people to attempt to port Android over to Pi. Who knows, Google might already be working on porting it, or at least supporting someone who's interested in doing that. After all, that would allow them to tap into a new, savvy user base.
Those of you looking to play with Android on Pi in advance of our source code release might want to check out the community
http://www.razdroid.net/Dead-link! project, which last month produced its first non-accelerated port of Gingerbread on top of the publicly released VideoCore binary.
Yes it is possible and there is already someone (called Naren) working on a port.
But it is unclear when you can install it yourself(the changed source code is not public yet) or if there will be a image available.
Update: As already commented the project is dead.
Android 4.0 is coming. It's announced on Raspberry Pi's homepage.
The current version is slow but the 4.0 looks promising.