Not that I can remember but, like you said, not a bad idea to list your company in as many places as possble :).  When I was in vendor managment for a company 4-5 years ago it was one of the sites I used to locate vendors along with SOT.  I used abstractorconnection.com too, but not as often; I usually found a decent option through SOT or LTO first (LTO wasn't as littered as it is now. I don't know if there is an administrator that removes inactive listings or double checks anything).  There seems to be a lot of sites popping up that offer this service now though... just be careful where you invest your money.