It's awesome, though getting everyone together can be tricky as it's normal wireless play only. Over Wi-fi it's 4 and 2 player only alas.
Cool single player modes too, well worth the import I thought
Yep, one cart = ten player. And the peeps without the cart don't get penalised either. Top stuff.
And, er, bugger. I forgot to bring my DS in with me today. I blame it on being a Monday