It appears that Wall of Coins has agreed to an advertisement deal with bitcoinity.org, and are refusing to honor their end of the agreement. Note: this is in no way balanced news, this is only bitcoinity's side of the story. So it is not posted to state with certainty that there are any issues at Wall of Coins. BUT - these types of signs are important when considering who to do business with.

I have never used them, but apparently they are a market maker that allows people to buy and sell bitcoins for cash.