So, earlier today I went looking to download some more DBZ music since I lost all the ones I had and came across a new Special that apperently aired September 21, 2008 called Dragon Ball: Yo! Son Goku and His Friends Return!!. I thought it was a joke when I clicked on it but it ended up being real as all the original Seiyuu were in it(Not to mention Akira Toriyama wrote it); I won't spoil it but a short saiyan lands on earth and says something that shocked everyone. It's set 2 years after Kid Buu's defeat.
here's a dl link
Quick note with the new live action being releast soon, like almost everyone here says, the male Son members'(Goten,Gohan,Goku) Seiyuu, Masako Nozawa, criticized Justin Chatwin's Pronunciation of Kamehameha.