It checks links from Yahoo! and Google as well as the DMOZ along with .gov links, del.icio.us, and even Google PageRank itself.
I punched in the two main URL’s that I use, http://www.thatedeguy.com and http://money.thatedeguy.com and I was a little surprised to find that the Page Strength tool could actually tell the difference. Usually, these tools, pagerank included seem to pool them together since the root domain is the same. It’s refreshing to see the subdomains being used properly. Another interesting observation was that the numbers ended up being nearly the same as the google pagerank. Maybe by design? Or maybe PageRank isn’t as far off as some would have us believe.
Overall, a useful tool that is, in appearance, more open than PageRank while getting similar results. I would have liked to see a few of the more obvious things fixed, but it’s young yet. The DMOZ search doesn’t seem to return any results, regardless of whether the link exists or not. The .gov search did include .mil at one time, but those are fairly inconsequential anyways. I’d also like to see the inclusion of sites such as Digg and Reddit and perhaps Slashdot. Might dilute the sample a little, but would certainly be a broader scope of the “Geek” favorites.
Thanks for the pointer: Link Building Blog