SEOmoz has launched a new Open Site Explorer tool, that provides a number of data points pulled from SEOmoz’s Linkscape tool and its index of the web. It shows stats such as overall link counts and a count of domains that link to a URL, along with anchor text distribution and more. A helpful feature is the ability to compare two domains side by side. Although it’s called “open,” the tool’s limited for those who aren’t SEOmoz Pro members. Guests’re allowed three reports per day, and those reports’ll show only up to 200 links per report. SEOmoz free account holders get unlimited reports and can see up to 1,000 links per report — this’s the level that seems to be most similar to what Yahoo Site Explorer offers. Paying SEOmoz Pro members get unlimited reports, up to 10,000 links per report, and a variety of other metrics not available to anyone else.
More info: Open Site Explorer