For me, I use the Web of Trust addon http://www.mywot.com/
This allows people in the Internet to give their 2-cents. When I see a link, it has a little colored icon next to it identifying the consensus. When one visits a page with a poor reputation, an HTML dialog box comes up warning you.
For suspect places, Web of Trust is usually blank due to name changes and such. Next I look at the Better Business Bureau. Then I read the heck out of what they wrote and what people write about them. Does it smell?
Making a permanent list seems like asking for feedback from their lawyers.
eminiscalp.com
Viper Trading Systems
The Trader Scalper and any service by John Paul
Traders International
Monster Trades and any service by Jay Wireman
FuturesTradingCoach.com
David Marsh Emini Trading System
CoiledMarkets.com
PureTick