Teamdouche is in fact working really hard on building CM7 based on GB. Take a look at twitter.com/cmsrc, you'll see a bunch of things have been committed to Gingerbread branch over the past 2-3 days or so.
As far as their planning for CM6 i'm not quite sure, but I'm guessing they might release minor updates for CM6 OR ditch it completely like they did when they went from CM5 to CM6 (Which means that they'll ditch froyo, but we'll never know until we find out if GB is light enough to run on legacy devices like G1 and the likes)
As far as their planning for CM6 i'm not quite sure, but I'm guessing they might release minor updates for CM6 OR ditch it completely like they did when they went from CM5 to CM6 (Which means that they'll ditch froyo, but we'll never know until we find out if GB is light enough to run on legacy devices like G1 and the likes)