I'd like to know if anyone has fully recovered from the penalty yet. I've seen a very slow climb back up, some sites have nearly recovered, some are taking more time. Building more links definitely helps. Maybe there is a half-life on the penalty? I would be interested to know about your experiences. Please check and don't reply if you got an algo penalty form penguin. This is a completely different penalty which stems from the huge blog networks taken down by Google months ago.