I know
Lucid Dreaming -- Dream Views has some solid info / FAQs on lucid dreaming and a very knowledgeable forum. I've never seen anything on lucid dreaming as a way of actually accessing and effecting the sub-conscious though, but I think its a great idea. Cleaning out all the negative riff-raff from your sub-conscious would be an excellent, positive way to start your day, you would feel great every single morning.