Bitcoin24.com is indeed a serious premium these days! It used to be cheaper to buy btc at btc24 then at mtgoxeur, about -3%, now it's 10% higher!?! 65€/btc at btc24 vs 59€/btc at mtgoxeur. Those that have cash at mtgox can make a nice margin buying btc cheaper there and selling at btc24.
Also note that btc24 has become larger in volume than mtgoxeur
No trading fees is very sweet
Barely any costs for depositis and withdrawals is also nice!
I love bitcoin24.com