I recently saw a couple of bugreports all complaining about debian/watch files failing with GoogleCode. Since I'm myself maintaining some packages whose upstream authors use Google as their hoster, I felt it was a good idea to offer a service for uscan(1) and DEHS.
You can reach the service at http://googlecode.debian.net.
To use it in your debian/watch, just use:
The source code is available at debian-it.it (you should give this url to git clone). This service is currently in beta testing; suggestions and patches are more than welcome! Also, feel free to report any issue you might encounter!