I created this issue: https://github.com/dglittle/misc/issues/1
A friend came along and did it: https://github.com/alltom/misc/blob/gh-pages/throbber.html
Here's a running version: http://dglittle.github.com/misc/throbber.html
I'm not quite sure how he found out about it.
I sent him a link to the job posting on oDesk so he could apply, and I could pay him.
Done, and done :)
Next, I want to use that throbber in nodesk.. here's the issue: https://github.com/dglittle/nodesk/issues/2