Since getting schooled in the comments on my last mention of Versions (a favorite of Robert's), I've reacquainted myself with Subversion ... and come to really enjoy using this polished and highly usable SVN client. Git may have its benefits, but for a lot of what I do (especially solo web design), Subversion (and Versions) make a lot of sense. Versions is, as of yesterday, officially out of beta and available for purchase. I even received a 10% discount for being in on the beta test.
Versions 1.0.1 is already out, which fixes the registration issues that some of us ran into. The initial 1.0 release included a lot of additional functionality, and Versions has become an amazing tool for handling all manner of Subversion-related revision control. Top on the list of new features, and of pretty major importance (at least to me), is the addition of an "Ignore [file/folder name]" option to the context menu. The full release notes are available at the Versions site, where you'll also find the download for the free demo. Versions is retailing at €39.00 (about $49USD), and users on the email notification list should have received a 10% discount coupon number.
Thanks to everyone who sent this in!