Experts Exchange
www.experts-exchange.com
Experts Exchange comprises of an online community of IT professionals that all help each other out with regards to technical problems. Experts Exchange holds in excess of 14 million solved problems concerning all areas of IT such as website design, server installation, windows server 2003, Microsoft Exchange and many more. You can browse all of these solutions for free and more often than not you will find and answer to your questions within this backlog of answers. In fact, if you have ever search on Google for the solution to an IT problem, the chances are that you have already come across Experts Exchange.
Experts Exchange also offer a membership service, it costs about £45 per year and for this you get to ask as many qusetions as you like. If you are in the IT industry I would strongly recommend this website. I work as a network engineer and I use Experts Exchange all the time - if you ask a question you will normally have a comprehensive answer within the hour, and the people answering it are very knowledgable. If you have quite a bit of IT knowledge yourself, you can avoid this expense by becoming an expert - every time you answer a question to the satisfaction of the asker, you will be awarded a certain amount of points, and these points enable you to ask questions yourself (without having a premium membership).