According to this new post on the Symfony blog the latest version of the framework has hit the shelves - Symfony 1.1.10.

Ladies and gentlemen, after a tremendous sprint, here is the release 1.0.10.

Fixes include modifications to ProjectExport, a problem with sfRouting and magic quotes, a correction to the sfConfigCache usage, the default log file permissions and a revert on some changes to the default time and date formats.

You can grab this latest release here and there's some documentation to get you started.