Just go my Yahoo account transferred to 'Mail' on my iPhone 3G and it works effortlessly!! However, i didn't see a 'Sign Off' when i'm on it. Are you signed off automatically when you click out of 'Mail'? If you go in the Settings, under Mail, Contacts, Calenders you will find your account and you can switch it off or on. Is this where you do it? It just doesn't seem so secure should someone get a hold of your iPhone 3G!.....maybe i overlooked the 're-enter password' button somewhere? i wasn't able to get my Hotmail account over (tried entering it in 'Other')...any one else have this problem? ...i'm all for the super quick access to my email accounts, but i guess i better be careful who i let handle my 3G!!!