I've just commited JPEG2000 support via OpenJPEG v2 into vil. At the moment this is limited to only read support. The core vil reader was implemented by myself and the pyramid decoding was implemented by Matthew Woehlke here at Kitware. As far as I can see it should not interfere with the existing JP2 reader (uses the proprietary ECW SDK). Please let me know if there are any questions / comments / problems.
R&D Engineer, Kitware, Inc.
(518) 371-3971 x603
-- "Mathematicians are tools for turning coffee grounds into formulas.", Paul Erdos