WikiTopic.org is Great Q&A, Review, & News Site. It seems to be a bit of a hybrid of all 3 items, and you know it seems to really work for them.
The layout and overal color scheme is pretty sweet. The user interface is very intuitive and super, super easy to use.
The site seems to be pretty new and so traffic is not to heavy, but all in all i think its a great idea and i think it will go far if properly managed and maintained.
Things to do:
Read topics, post questions, post answers, write news articles, read reviews, write reviews, and more.
Have a go and check it out