Our friends over at Jaunted.com have put the Internets to good use again, mashing Google Maps with their guide on where to park in LA. While its probably slightly more helpful for tourists than anyone who has been here more than, like, a week (hey! Santa Monica has free garages!) they're looking for your input to populate the maps.
Also, they include links to how to pay parking tickets online for Beverly Hills, LA, and Santa Monica, as well as how to spot the "parking wenches."