What will they think of next? Check out this website. It has a prototype of making an espresso shot without having an espresso machine. I have a feeling it might not taste as good as a good shot of espresso from a full blown espresso machine (like the one at Vienna Coffee House, but it's an interesting idea.
Check it out...
http://www.yankodesign.com/2011/05/10/one-shot-espresso-gun/
"Just like loading your double-barrel gun and taking a shot at the monster down the alley! I get the same kinda vibe with the il Tiro – One Shot of Espresso; a gun shaped dispenser that delivers the perfect shot of cuppa delight. The video explains the workings and if you ask me, it will definitely be a conversation starter with your local barista." - Yanko Design