Update Aug. 30/05 AM: fixed a few text errors caused by the Blogger spell checker. ;) - Thanks Alex!
The ZDNet Goverment Blog is calling for more government-backed Google Maps mashups. In this post, they have this to say:
So far, although much of this stuff is based on government-supplied data, we haven't seen any mashups created by government agencies. This would be really be e-government and citizen-based government in action. (read the entire post)
UK-based IdealGovernment.com has been on about this for some time. They started the competition geared toward Google Maps mashups using publicly accessible government related information. They recently announced winners for that competition.