When last we heard, there was no other information about the upcoming casual MMO Battlefield Heroes other than 'It's in development'. Well, now we have more -- a lot more.
According to the trailer, BH is completely free to download and play, features full leveling of your character, a matching service that ensures that you only play against others of your level, an overarching 'metagame' to measure your progress against, and it's still slated for a Summer release.
It's worth checking out the website for the developer blog, as anyone who's interested in how a game like this comes together will find items of interest both now and going forward. Perhaps our earlier question about whether or not the WWII setting will feel limiting is mitigated by the fact that for all intents and purposes, you'll be playing an olive drab colored online version of Mario Kart.