Don't do your self the disservice of self-signed - you can get a free cert from startssl.

The CA landscape has changed.... what used to be expensive and required a lot of paperwork is getting cheap/free, and CAs are pushing "Extended validation" certificates and whatnot (the ones that turn your browser bar green, etc....)

Just hit up startssl and get a real certificate... it's that easy. No strings attached.

(Repeating this because I ignored it for about a year until actually checking it out and realizing I'd been an idiot)

ALSO

Given the single utility of this - just inline the scripts you need and avoid the request overhead. You can probably strip out all the functions you don't need to minimize the load time. You could offer a minimized version as well....

ALSO

Very cool! Thanks!