I thouhgt I knew all the competing websites out there. Google has a great feature you can use to check out site Google considers similar to yours. Simply paste this in the Google search (replace with your site).

related:http://www.usfkclassifieds.com/

Hope that helps other newbies like me!

Mike

You can also click on the 'similiar pages' link after a normal search to get the same results. It's not always going to be your competition though. For my site Google will list other sites that mention mine or have a link to mine.