Steam Cloud Plans

Maximum PC has a report on an event where Valve unveiled new features planned for an upcoming Steam update, including automatic driver updates for hardware and an integrated system requirements checker for games. Here's a bit on the Steam Cloud:
Community enhancements include improved event planning – RSVP, calendar functions, and official communities are all part of the feature list. Gamers will be able to coordinate tournaments, use calendars to check up on their friends, and join communities set up by game publishers and developers.

The biggest news is that game-generated data will now be stored with your Steam accounts in Valve servers. This includes game profiles, configuration settings, and even savegames! Valve will first be rolling this feature out to existing games like the Half-Life franchise, TF2, Counter-Strike. Left4Dead will be the first new game to remotely save your progress.