Gamasutra reports. Acclaim's site says that all of its online games have been shut down as of August 26 and unused "Acclaim Coins" are being refunded. A couple of games, Kogamu and RockFREE, will continue to live on under the Playdom banner.
Playdom was bought a month ago by Disney which apparently had little interest in continuing to support Acclaim titles like 9Dragons. Though we can't claim to be big fans of any of their MMOs -- and can't really say we know anyone who fits that description -- it does seem kind of a jarring way to leave consumers.