Ixcoin has a big advantage by being a bitcoin clone. One example;

The iguana project by jl777 is a drop in replacement for bitcoind. It is also a multi coin wallet with decentralized trading. Ixcoin will be very easy to add to this wallet. Ixcoin will even be easier to add then litecoin and namecoin.

A big selling point should be, if bitcoin can do it, so can ixcoin.