re: Job Interview Process

Generally... what type of job / industry is this in? Perhaps, going by your username, a teacher?

You interviewed at three seperate times?

At least in my profession, third interviews are very rare (unless the first one was a BS one with a recruiter).

I would say give it the weekend, on Monday, maybe a brief e-mail just once again thanking them for the opportunity to meet about the posistion.

Employers take their sweet time sometimes. Plus, in this day and age, it's not uncommon for an applicant who was not selected to not ever hear anything back.