Successful businesses became successful because they KNOW what their customers want and they make it happen. 

So, what do your customers want?  Are they looking for dialogue or for FAQs?  Do they need help with ideas on how to use your product, or are they just looking for a place to vent?

Try a blogging survey.  Take a look at Technorati’s blog survey and create your own.  You need to know what your customers want, if you have any hopes of pleasing them.