This is a comment, not a question. I've been testing some things here. One niche I'm in has the landing page with just a sig link pointed to it from just one site. Another niche has a lot of Web 2.0 properties and articles submissions pointing at the same landing page but with a different anchor text (and in a different niche). Guess what is moving ahead at a faster rate? The one w/ the sig link. Go figure...