@BitCoinWisdom
It's starting to look like Mintpal is the major exchange for altcoins (other than LTC). I noticed they're already added as an exchange.
Could you consider adding Mintpal's top 5 currencies by volume, whatever they are at a time, and update that list, say once a month or so? Altcoin volume changes quickly, and you probably don't want to list all of their currencies, but the 5 or so biggest currencies on the perhaps biggest altcoin exchange seems reasonable, no?
Now top 4 currencies by volume of 7 days are listed.