Steam Cloud Launches This Week
Valve announced yesterday that their extension of Steam, called Steam Cloud, will launch later this week with the Left 4 Dead demo. Steam Cloud is "a set of services for Steam that stores application data online and allows user experiences to be consistent from any PC." We discussed an early announcement for it back in May. Valve adds that "Steam Cloud will be available to all publishers and developers using Steam, free of charge, and Valve will add Cloud support to its back catalog of Steam games. Cloud services are compatible with games purchased via Steam, at retail, and other digital outlets."
I have just been performing a file sync with all my saved games every morning between my laptop and desktop for about 3 months now.
It saves internet usage, costs nothing, works for all games, and provides a backup in case one machine dies catastrophically.
Steam cloud is an interesting concept, but it really doesn't provide any additional functionality against what I have already been doing.