Valve sent out a press release this morning announcing that its downloadable game service, Steam, hit the 30 million user mark during the past 12 months.

Also during that time period, Valve says sales grew over 200 percent "putting it on track for a sixth straight year" of 100 percent jumps in year-on-year growth. Here are some other interesting factoids included in the press release:

* Steam infrastructure runs at 400Gps, enough bandwidth to ship a digitised Oxford English Dictionary 92.6 times per second.

* Valve's Steamworks services suite (which includes digital rights management solutions) hit the 200-units-shipped in the last 12 months after being on the market for two years.

* The Steam Cloud surpassed the 100 million files saved mark.