According to this link, Return to Cranford releases on DVD January 19th. There's no Amazon listing yet, in case you were wondering. :) If you've never watched Cranford, be looking for your PBS station to re-air the first miniseries beginning sometime mid-December, or Netflix it asap!
While the new Emma has apparently received very mixed reviews, I'm excited about it (a lot of that has to do with the presence of Jonny Lee Miller, just sayin'...). According to this link, Emma releases on DVD February 9th. No Amazon pre-order link available yet for this release, either.
Now if only PBS would release the rest of the Masterpiece Classic schedule, I'd be one happy camper. :)