Added Feed the Village, Epinions, Review Party and Letter Rep to the list.
Descriptions are up for all of them except Feed the Village. Still not sure about it yet. Epinions and Review Party are both review sites, although Review Party sets itself apart from other review sites in that it doesn't pay a lump sum, but offers you the opportunity to earn through ads displayed on your reviews. Letter Rep is a niche market website, specialising only in letter assignments.