Create league tables of the top bloggers in your field.
You have the A-List table, the B-List Table, the C-List table and down it goes. Ask current bloggers who to add to which list. It gets them involved at the beginning.
Now find a coder to create a DIGG’ish ‘SCORE’ tag bloggers add to their posts. Whenever the blogger writes a great post, your community can click ‘score’ (next to the Stumble It!) and the blogger automatically get points on your community’s league table.
It takes a bit of coding, but the results are worth it.
Every 3 months you have promotions and relegations, no playoffs. You could even have trophies.
Now your community decides who are the A-list bloggers and who are the D-list bloggers. And it’s not a bad resource too.