I dunno... there's a local store here that sells the DS mod cards. Not sure what else on the site is so horribly illegal. They don't even sell wiikeys. Come on now :-P If a local store can sell the mod card, then there's no reason for them to block a site that does. Besides, there are lots of sites in the uk and otherwise that sell worse than the ds card. Ps2 mod tools, xbox mods, etc. Blocking this site because it sells ds cards is just ridiculous really.
And for those not in the UK - OK! WE GET IT. It works for you. We've already concluded it's an issue on the O2 network.