I recently got the Once Upon a Sesame Street Christmas DVD. The special was good. Interestingly, when new DVDs are announced, we get to see the cover and full info on the bonus features within days of the announcement, but with this release, they didn't announce the features until closer to the release date.
I had thought that Christmas Eve on Sesame Street would make a good bonus feature on this (even though I already have the special), but the bonus special/video is A Sesame Street Christmas Carol, which in thinking about it is a better choice, as it includes clips from most of the previous Christmas specials (and it's the only one I had not seen, not counting that Christmas concert thing).
In video news, it's been announced that the next release will be The Best of Elmo 4, coming February 13. And for once, I actually don't care so much about knowing what will be included this time. Don't really know off-hand what Elmo segments are left (not counting '80s/early-'90s segments), but I have a feeling that it'll contain street stories (I think the description mentions those), I also wouldn't be surprised if it was a showcase for Elmo's World (new or old) and Elmo: The Musical.
And since Warner Home Video got the Sesame Street license, I think we're currently at the longest gap between video releases (about four months), unless there's an exclusive release coming out somewhere that's not announced (a number of initial Target/Wal-Mart exclusives weren't announced before their releases).