I just wanted to take note that Bitcoin Signature Generator has just passed 1000 signatures mark, which is incredible. They all were viewed ~2600 times. I hope you got a few BTCs thanks to them
I don't have much time to work on this service now, but if you have some decent feature requests, don't hesitate to ask. I may find some time to implement them. Also, if you are a graphic designer and can design some nice icons to be used with the sigs, I'll happily add a feature to change the icon.