Come on now! Shouldn't it at least be a $! per megabyte?
Seriously, I think you're right. I think it would be nice for Apple to have different packages. 15MB of email for $15 a year wouldn't be bad. Maybe 20MB of unified email and iDisk for $25 would be a decent deal as well. But, when you really look at it, $100 a year isn't much to ask for what Apple is offering--especially when you consider the expense involved in owning a computer anyway. Some mouses cost $60!