What's Steam been doing in the nine months since Valve last released detailed statistics? Adding another five million users and more than 200 new games, for starters.
PopCap Games' garden of the living dead strategy game, Plants vs. Zombies, gets an upgrade today, touting its "Game of the Year" status with a handful of upgrades (and one downgrade).
Rolling out with the upcoming demo of Valve's Left 4 Dead, Steam Cloud is a set of services announced back in March that will save various game settings on the server, so gamers will be able to easily transfer games to new machines with all of their tweaks and configurations intact. You'll be able to log into another…