Everyone has implicit biases. It takes a huge amount of effort to work past them and write content that is considered unbiased. The latter is a group effort to achieve consensus, which even in the hard sciences is often difficult, but Wikipedia has had fantastic successes there - e.g. look at any controversial subject (someone mentioned BP, and how half the page was about their "controversies", which does not say that they are true, nor false, but acknowledges that they exist all the same - most people, with the exclusion of the BP execs I am sure - would consider that to be a state that is unbiased).

In fact, the OP brings up a major source of bias to begin with: if someone wants to federate a blogging website, why would we even talk about it - just DO IT!:-) However, the name "Wikipedia" was mentioned b/c it is popular. This introduces a bias whereby the rest of the discussion will be predicated upon the lines of what Wikipedia is vs. what it is not. Even though the OP made it clear that "Wikipedia" is not the goal of that project at all. Even dragging its name into it has thus introduced a source of bias, rather than allowing everyone here to discuss the merits of this proposal on its own, as if made from scratch rather than a Wikipedia-clone ("good" connotations?) or Wikipedia-wanna-be ("bad" ones?) or Wikipedia-whatever.