While performing a research of leaders for selected keywords, I ran into the interesting trend. Sites with low keywords density and low number of external links rank high with Google. I suspect that they use SPAMing techniques. Unfortunately, I don't know how to detect them by looking at the source code. Could you please give me hints on what to look for? For example, this site is ranked #1 in Google for a very competitive keyword - palm application development - http://www.handheldnews.com/link.asp?ObjectID=4254. How can that be explained?