Getting back to working on the GoogleHealth demo. Code that used to work a month ago doesn't anymore - the only change is, I upgraded Firefox. Which caused some problems with XMLHttpRequest. D'oh - the code works just fine in Internet Explorer, save for the (useless) ActiveX warnings. Why, why, why Firefox, why do you return a '0' status? Changes/bugs/whatever it is such as this as very annoying, a waste of time, and a serious productivity drain. Not to mention that Firefox doesn't seem to render this very site correctly.
Ok enough ranting. Will be documenting the GH project next... update to follow.