Since December of 2006, I've been a member of an awesome makeup website/forum called Makeup Talk. The people there are so incredibly helpful that you immediately feel like you're a part of the group, even when you're brand new. In the nearly 4 years that I've been there, I haven't experienced any of the drama that some other makeup forums get and I highly recommend MUT to anyone looking to chat with other beauty enthusiasts.
In October, MUT completely revamped their website and added a ton of new features. There is literally something for everyone there, from makeup to fashion to fitness/diets and even home stuff. They have a section for product reviews, swapping, photo galleries and a brand new feature called a "Wiki" that serves as a how-to guide and collection of articles.
If you're not familiar with MUT, take a minute to drop by and check it out! Like I said, the people there are so friendly and so helpful. The administrators/moderators there really go out of their way to make it an awesome place.
If you have a beauty blog of your own, be sure to check out the contest they're running! They're randomly giving away 3 $50 gift cards to MAC. And who in the beauty world doesn't love MAC? I know I already have a wish list started... Check out their website for more details if you're interested! There's still plenty of time to enter and a $50 giftcard would sure be nice right before the holidays... :)