Vanilla 1 is no longer supported or maintained. If you need a copy, you can get it here
Vanilla 1.1.7 has been released and is now available at getvanilla.com
This version fixes a couple of bugs in the installer. It is not necessary to upgrade existing installations. If you want to upgrade anyway, you'll want to read the upgrade instructions
If you're curious about the bugs that were fixed, read the release notes
A big thank you to all of the contributors!