Unfortunealy there was a poll on CoinPayments.net which has just ended, surprised this wasn't pushed more. I should have posted but have only recently joined here.
The results were
Megacoin - MEC - 56 (27.5%)
AndroidsTokens - ADT - 30 (14.7%)
Anoncoin - ANC - 30 (14.7%)
Quark - QRK - 28 (13.7%)
Zetacoin - ZET - 25 (12.3%)
Besides that, are there any Mincoin payment processors?