If you had a great interview and it seems like not only a great company, team and position, you want to make sure you let your interviewer know your intentions and your feelings.
Upon the conclusion of an interview, you should make sure that you thank the interviewer for taking the time to meet with you. Immediately follow this by telling the interviewer that the interview not only convinced you that you are interested in the position, but also convinced you that your skill set and experience is ideal for the position.
Reinforce this by giving a brief summary of your qualifications. Don't go on for too long - highlight the top three skills you have that you feel make you tailor made for the position. (Don't ruin your brilliant summation by squealing your tires on the way out of the parking lot.)