Only problem with using TGA that I can see is when you have 30 different unit images with 300-400 frames of animation each and you have 2d sprites of these (high poly) already rendered out and the file size of the TGA images are 10-20mb each compared with their gif file sizes of 400-800kb each. Our program is downloaded and I don't think people would appreciate us going from 33mb to a 300mb download size
No doubt I'd have to drop some frames but even still the download would be at least a 4x increase in size just for unit images, not to mention buildings, terrain and terrain objects.
So I will have to write my own gif-to-TGA file format conversion class. Has anyone already done this who could share their code? Or at least provide a link for the TGA format, after a few searches on this I've come up empty. If one of the developers could comment about the possibility of future support in this area I'd shelf my plans in this area and wait for a Sun solution.