CNet has a good article about bad interviewees. I can tell you that if someone came into my office asking about money rather than the job duties, or behaved rudely, they’d be out of there before they knew what hit them. I really don’t care what people wear, I just expect an interest in the work, and basic courtesy. When I go to job interviews, I wear what I expect to wear to work if I get the job, or more likely, what I wear to my current job. Even if I wanted to wear a coat and tie, dressing up to go to work would be a sure sign that I had an interview somewhere else.