However, I don't know how many merit sources there currently are, or how active they are, but I'll betcha it'd probably help things if Theymos added some new ones. Speaking of that, I haven't seen any new applications to be a merit source in quite some time.
There are 110 merit sources.
https://bitcointalk.org/index.php?action=merit;stats=sourcesThere are many people that have applied for merit source, but no one has been selected yet after the last selection.