ide_cyan:
It's been down for about ten minutes now (that I noticed -- it might have been down already while I was AFK.) Here's their status message:

Livejournal.com is currently unavailable for a brief emergency maintenance. We'll be up again shortly.

Thank you for your patience.

ETA:

Here's status.livejournal.org info, now with incomplete sentences:

LiveJournal is currently. Our Operations staff is working to resolve the problem as quickly as possible.

3:48 am GMT (Tuesday, July 15)