if you didn't already know about it, check out:
http://www.livejournal.com/misc/expunged_list.bml - a dead journals registry.
What's more, you can for a mere $15 dollars purchase a "rename token" that will let you use it as your journal title. So for instance I could purchase the old LJ moniker of Matt,
cubikbeats and start blogging there myself. Does anyone besides myself find this vaguely creepy and dystopian? It's a telling slice of postmodern zeitgeist.