A huge site with a ton of information on everything musical.
A smaller site with good information and links
Pretty self exlpanitory
No representation? These guys will potentially get your music heard by people that matter. You pay money, they send a list of what they're looking for, you send tapes. Taxi pre-screens the tapes, and forwards the best ones to the labels.
Good tips on keeping costs down. The bottom line still is P-R-A-C-T-I-C-E.
More useful recording information.