Nope. I'm using my factory CD player/deck rear speaker lines to feed my sub amp. It works, but doesn't sound very good, as they have a very poor, weak signal. I'm saving up for a better head unit with sub output, which I'm sure will give me much better results.
As for the remote power wire, I'm using the antenna power wire in the trunk, which turns on with the ignition. Again, this isn't ideal as the amp remains on when the head unit/CD is off, but it was much easier than finding the correct power wire feeding the head unit (which I believe is inside an 11-pin cable). Anyone have any better solutions for using the factory deck to feed external amps?