Update: You can block your pages from SEOMoz. SEOMoz documented the procedure, but it is as simple as a meta tag: <META NAME="SEOMOZ" CONTENT="NOINDEX" />
At SMX East, SEOmoz launched Linkscape, a powerful tool that will give you competitive analysis of linkage data. The tool has been lauded as extremely powerful though there have been some criticisms. In the Smackdown blog, Michael VanDemar attacks the credibility of the tool and claims that there is no way to block the user agent, at least not now. Therefore, we're still waiting to hear from SEOmoz on how to block the Linkscape tool from crawling their pages.
In Barry's coverage of the launch of the tool, he noted speaking with Rand about this issue. Rand told Barry that they will announce a single useragent that people can use to block the SEOmoz bots from crawling their site The question is, when will this capability come?
There's a lengthy discussion on Sphinn about the issue.