We've listed XSPEC on BTCPOP and I bought some my self to get the pooled staking a bit quicker started.
On BTCPOP you get staking rewards for all PoS coins you hold in your account and for coins in sell orders.
We've a lot PoS coins already on BTCPOP and keep adding more.
Soon we'll also offer shared Masternodes and a lot of Masternode coins.