If you set up a donation drive I could definitely throw in more than a few bucks to support the development, but other than that it would have to be out of the goodness of your heart (for my part at least). :P

Unfortunately I would have no idea how to code any of that, but a tileset I can do. As for anti-aliasing, are you saying you could support actual transparency? Because obviously being able to make smooth edges that blend into the background would be a huge deal to the graphics, but I'm not expecting that.

Even just taking a pixel brush and then painting in the boundaries of that shape without any hard color limits would still be a huge upgrade. Even just one stroke with a normal photoshop brush exceeds the color limits the current tileset palette offers. Most of the time for my Jazz 2 tilsets, I've had to make the good graphics painting in pixels. And that's just a huge time-consuming pain.

Edit: For example, take a look at this background I painted a few years back:


Space Station Stadium by Bogrim on deviantART

Even with aliased edges, I would still be able to replicate most of that in a Jazz tileset without the color limit.