Here are a few sites I visit from time to time.
The best one IMO is scform but the blog owner has been busy or something like that and has not updated the blog in more than a month. He has reviewed a lot of men skin care products and I am actually using some of his recommendations and they do work very well. Makeupalley is another good place to read reviews on products but keep in mind that it's more female product orientated so you won't get much reviews about male products. Plus you got to be a member to read the reviews. I personally don't really make a distinction between male or female skin products. Menessentials is alright too but the lack of active members has made most reviews out of date. Styleforum is not bad and are among the better forums for men skin care but I can't stand the search function ! Badger and Blade although more shaving orientated does have a section dedicated to skin care. But don't expect to find reviews on products from Avene, Shiseido or Estee Lauder here LOL.
If anyone else has any male skin care/blog suggestions please do share. The lack or reviews on male skin care products is heart breaking when you end up doing the trial and error way and end up wasting a lot of money.