Yep, IJ was down last night. You might find the following link useful the next time IJ is experiencing problems: http://twitter.com/insanejournal. It's an off-IJ place where you can find updates on the status of the site -- so if there's something wrong, it will be posted there.

Incidentally, there's a similar site for LJ, if you ever need that: http://status.livejournal.org/. I have both of these bookmarked just in case either site has problems.