grants.gov, "a central storehouse for information on over 1,000 grant programs and provides access to approximately $500 billion in annual awards," started a blog back in August. It is available at at the commercial, (not dot-gov) site: http://grants-gov.blogspot.com/

I found both the grants.gov site and the blog a bit confusing. It was not clear to me who the audience was. Maybe I should have spent more time evaluating it. But this site has had its problems being user friendly. See Should Grants.gov Be Abolished? and Grants.gov is Windows-only.

FCW.com article on grants/contracts database:
http://www.fcw.com/article103323-07-26-07-Web
No registration required.

The General Services Administration intends to issue a sole-sourcing purchase order to Eagle Eye Publishers for custom programming services as the agency works to put federal contract and grant information into an easily searchable public database.