I've been hearing a lot of buzz about the 21st as well. Honestly, I think all this speculation will prevent me from purchasing Bethesda/Obsidian products. As lame as it may sound, it has become increasingly frustrating to wait for FO:NV dlc, and have the
developers not give us ANY news about when it comes out.
I guess we keep waiting, unless it somehow finds a release at some point today.
Listen Obsidian and Bethesda never formally announced a release date and before anyone says it was on their website but they took it down it probably wasn't meant to be up. The most we have is an interview that they say June 2011 but that was only done by
the girl doing the interview. So speculation has no merit in this area.