Here is a couple of web sites that will help with Excel.
http://www.tek-tips.com/
On Tek-tips you can ask questions and people compete for "stars" to help with answers. You have to register first, but it is free. As far as I can tell there is not an excel forum, but you can get some answers there under the Microsoft Office forum.
http://www.experts-exchange.com/
On Experts Exchange, you can register and then search for questions/answers or you can pay -- either a certain amount for "points" or you can pay a flat fee a month for unlimited points. With points, you can ask the questions and 'the experts' fight for points. Who ever answers the questions correctly first, gets the points (you decide who gets them) and sometimes you will get answers within a few minutes. (It's been awhile since I was on this site and I know they have changed their set up, but there is still a free membership option.)
I've had good luck with both sites when I had questions on MS Access. I imagine the other forums (Excel for example) would be the same.