1) Google code search: http://www.google.com/codesearch
This lets you search for public source code. I am sure this will become a great resource for me as I try to learn Python.
2) Blogger Backup: http://www.codeplex.com/bloggerbackup
This freeware utility (source code is also availavle) lets you backup your Blogger posts as atom/XML files stored locally on your machine. It took less than a minute to back up all of my posts into individual XML files that can easily be restored to Blogger if need be. There is no image support yet, but that is in the works.