Recently I have taken the plunge and head first into Arduino, Raspberry Pi, Linux, programming, RFID and various display technologies.
In my immediate group of geeky / techie friends I find I am quite alone ( bar one or two) in this obsession to find a way of putting all of this to good use.
Think I need to find a local Hack Space / Raspberry Jam or even start one!
Stick an RFID tag in your arm to open the door at work. I would if I had a door.
I know a guy who got one implanted in his hand, between his thumb and his finger, so he could get into Nottingham Hackspace.