Theres a way you can do it ... But sadly, your brother should have a 3rd party browser installed ... I suggest iCab mobile browser ... Its only $2 and the amount of things yu can do with it is endless .. So here are the steps to follow to access ur @me account on ur brothers ipad ..
1. Install iCab Mobile Browser
2. Go to settings with in the app (top-right corner theres a gear icon)
3. Once your in settings scroll down and select Browser ID , then select Firefox 4.0(Windows).
The above step makes icloud.com see as if yu were logging in from a windows PC ..
4. Icloud.com will open and allow yu to sign in .. So now yu can have access to ur mail and notes and find my iphone and etc ..
Works 100% , try it and let me know ... Other things yu can do with icab mobile browser are : download videos , files , upload photos to facebook and much much more ..