It's worth noting that it's against the Google Visualization terms of service to self-host the javascript. It's not a big deal if you need the pure JS stuff, but anything which generates images is sending the data to google's servers. Be careful exactly what you're using if you're displaying sensitive data.
I didn't know they'd added TeX formulae; that's awesome. It's going to be a very long time before we see near-universal MathML adoption, but this pretty much eliminates the need for it.
Whoever came up with the 3D pie charts needs to be locked up, however.
Ahh, very nice. I've been wanting more customisability from Google Charts for a while. It was between SVG charts and Google Charts and I think Google won.
Side note: How many times has Google made a reference to XKCD? Haha
I don't know about publicly on the internet, but their offices are almost plastered with XKCD comics. There are lots of them on the walls in common areas.