General Land Office Records
There was a page in the free issue of the Internet Genealogy Magazine about the General Land Office Records Online. I had remembered reading about this website a long time ago as one of the top 14 websites for Professional Genealogists. But when I first heard about it, it was offline. It seems to be up and working again though and I was happy to try it out and find one of my ancestors' land patents.
A land patent for my husband's ancestor, Samuel Bickel, born in Indiana in 1834 and then moved to Missouri.
And here is a land patent for Heber J. Grant, the 7th President of the LDS Church, and George A. Holt, a member of the LDS church who served as a Bishop in Enterprise, Utah.
The General Land Office Records site has images of over 2 million federal land patents. Almost all of my husband's ancestors are from New England though, so my only complaint is that they don't cover the thirteen colonies.