I think i may be to late to give my opinion: Look smart you dont need to wear a tie but never wear jeans for any interview Amen
Actually I disagree with the be yourself comment w3bmaster... When you go to get a job.. you have to be what your employer wants you to be.. not the other way around....
A suit is the way to go. Keep in mind you only have to do this for the interview & then you can wear whatever they wear.
It all depents on what work is al about.You wount wear a suit when you apply to work as an mechanic,video shop or even Mc donalds.