Valve released a patch for the game today which addressed several of the bugs in the game, mentioned in my review a couple days ago. The stuttering when auto-saving (or any other time) is gone, the garbled screenshots are fixed and quick saving is actually pretty quick now. Load times are a bit longer, but it's a worthwhile trade-off, IMHO
They've also announced the full Half-Life 2 SDK will be out next week, and I'm looking forward to some HL2 modding! They mentioned a "surprise" next week, as well. Can't wait to see what else they've got up their sleeves!