Use this google tool to see if your website is the right cateogory , or google known about your website topics : http://labs.google.com/personalized/siteflavored?url=softgroups.com
Nice tool. It did a very good job classifying most of my sites. I guess that means I have them optimized correctly.
One of my sites could not be classified. It said I could select, which I did, but I don't think this tool actually allows you to apply anything. Seems not to be its purpose. It matched up others okay.
However this is a very good proof that Google care more about a website relevancy. If you are getting lot's of links from websites with same topic, you will rank higher in SERPs. Just same category/sub-category. After doing some tests, I discoevered if I am adding more topics/terms to a webiste (Like talking on the same site about adult/programming/online shopping) my website won't rank to high for all those 3.Something like I will loose in relevance.