It's nice of apple to set things up for total beginners, but I wish they'd make the options a bit more obvious for things like this. The average pc switcher is going to assume that macs are just a big step backwards and not realise that the MM is a 3 button mouse!
Besides that, I'd recommend trying some other mice - some people like the mighty mouse, others hate it. I found it nice to look at, but not that comfortable, accurate, flexible or reliable (especially the left/right click thing).