We've set up a link on our home page to a collection of federal, state, and independent sites about different aspects of the Stimulus package, aka ARRA, the American Recovery and Reinvestment Act of 2009. We're adding several new sites a week as we get the information, so be sure to check back often. If you come across a website that you think we should add, send it on to email@example.com with "ARRA Website" in the subject field.
The most recent site we've added is from the State of New Mexico, and it even has an option to submit a proposal for financing. Thanks to the SF Reporter blog SFReeper for the tip!