re: Was told "Business Casual" for interview: tie or no tie?

Go in a day early and see what the employees are wearing, that's what you wear to your interview, because despite what clowns like Mingo authoratively say there is no standard for business casual. Each company might have it's own standards, and while it's doubtful you would get dinged for wearing a jacket when the company doesn't require a jacket as part of business casual, you dress for the job you want, meaning you find out what they want and that's what you wear. Some companies even consider shirt and tie without jacket as business casual.