Ethereum hardforked to make the DAO a contract that can only pay out ethereum to DAO holders.
The people can now get their ethers out of the contract and the DAO will be disbanded afterwards. Therefore, it will not be listed anymore. Maybe some people will retain some of their tokens as long as it is traded on poloniex and other exchanges, but I guess they will force people to turn in their tokens at one point.
What I'm wondering though, is what will happen to the ethers that remain, as there are also people that bought at higher rates than 100 DAO / ether.
There is special reserve refund contract in development for them.