An update to Steam Client has been released and will be auto-installed on anyone utilizing it for Steam-based games like CS: Source and Half Life 2. Though I'm sure we'd all much rather see the HL2 expansion than a steam update, the update fixes a few bugs and activated the Friends beta, so if you've already downloaded it you can give it a go. No updates to HL2 were posted, sadly. If you care about statistics, there's also a better hardware detection scheme put into place to see how your system ranks amongst the others.