I'm using chrome on linux and I can't see the latex equations. Does anybody also notice that?
I seem to have the same problem now. According to http://code.google.com/p/chromium/issues/detail?id=54981 the problem was introduced around 28 Aug. You were probably using the dev version, right? Anyway, there's also a bug filed against MathJax http://sourceforge.net/tracker/?func=detail&aid=3062770&group_id=261188&atid=1240827
For now, you may want to go to google's bug (first link) and vote for it (see star to the left of 54981) so that we bump the priority of the problem.
Have you tried http://www.mathjax.org/demos/ ?