I am going to add case-insensitiveness and many other coin addresses support. This is very first alpha version

Well, thats good but I don't think what are the other altcoins can be able to make their own vanity address? I wonder ether has uses split-key address and some altcoins. But if its like some generator out there that only generate the private key and its address then its useless since its not totally safe to
sell buy vanity with that method.
Any coins using elliptic curve cryptography (ECC) are split-key-ready. Even vanitygen-plus support bunch of coins: