Ask HN: I'm making an API for Help Bubble. What should I add?

Howdy, gang; Back in March, I posted an announcement of a new side project of mine here and got a lot of good feedback (http://news.ycombinator.com/item?id=1222532). dustball (the other developer) and I have iterated a bit, improved the administration UI, and most importantly, started building a public API to let you control the Help Bubble on your site.

So far, it's pretty basic stuff, but we're hoping it's a good start. What would you add? What would help make Help Bubble a useful tool for your site?