Wierd thing happening. Been going to sleep around 3.30-ish or so in the morning, but waking up somewhere between 8 and 9. I get up for an hour or so, then go back to bed until noon or 1.
(And I've been having dreams about assignments that need to get done for school, but that's another issue entirely.)
Fun sleep fact: some studies have shown that if you shut someone up in a room without sunlight for a while, their circadian cycle runs at about 25 hours rather than 24. (Other studies dispute this claim.)
Here's a bunch of links to info about disorders of the sleep/wake cycle (although many seem to be 404). And here's Google's directory to stuff about sleep disorders.