For those of us who wanted some kind of continuation of Yu Yu Hakusho, I've got some info.

Yu Yu Hakusho Cast Reunites for New Picture Drama

Apparently, the Japanese home video distributor, Bandai Visual, released the entire series on Blu-ray on October 27, 2009. This DVD contains a three episode picture drama that takes place after the final episode of the series. As a picture drama, this sequel has still pictures synced to audio done by the reuniting cast members. Of course, it's in Japanese, but maybe it'll end up English subbed.