According to the Weekly Shounen Jump vol.21 2008, Shueisya has started the production of new animation of Dragon Ball and One Piece. It is one of the special projects to cerebrate the 40th anniversary of Jump magazine. They will tour 10 major cities of Japan this fall and those new animation will be put on view there.
scan of notice on the magazine
Edited on Nov 25th===========
The new animations of "One Piece", "Dragon Ball", and "Tegamibachi" shown at the Jump Super Anime Tour are now available online. Go to the official website
and download the special video viewer.