just get out there, and throw down a business card that says
Karma : 26555
you will instantly get the job.
in all seriousness, just be yourself. from what you say, you seem a great match for them. act normally, and they will see this too. if not, screw em. Dont try to force it. there is nothing i hate more than someone trying too hard to be cool, especially if i know they already are. so just give it your all, speak genuinely, and then come back to NS when you get the job and claim it hard!
Best of Luck!!