I've noticed the image has disappeared from my signature, and I've not noticed them in anyone else's lately..
Currently? No. I've had to reinstall a lot of stuff due to temporary issues on my server.
I should be able to get it up and in working order again soon though. All signatures should then start working again. Sorry for suddenly disappearing without notice
As for plans to release the source code... yes, I'll definitely be looking at doing that some point in the future, though I'd like to fix some small issues first though.