Just now launching in LA after successful rollouts in other places across the country you totally don't care about, Lovely's a pretty ingenious apartment-hunting site that aggregates real-time content from Craigslist and elsewhere, and puts it in an easy-to-use Gmap, also what 50 Cent uses to find his homies (holla!).
The whole thing's unbelievably simple and sexily laid out: put in the section of town where you want to live (Arcadia!!) and it'll plot out listings that are popup-able w/ photos and more info, including the number of days a post's been up, aka its "Freshness" -- so... expect Bel Air to be 365. The whole site's got loads of search options (from price to # of bathrooms), and once you find a spot you dig, you can even send an impressively pre-written email to a landlord directly through the website, as nobody rents to someone with an EarthLink Pro account.
Oh, and if you register on the site, you can also get an email every time a new listing that matches your criteria comes up, though that may not be very helpful if your sole requirement is that it's "Somewhere In Da Club".