Check this one out: The Lazydrinker
It’s a modified portable cooler that is designed to hold, cool, and mix up to 16 bottles of beverages. Basically it pressurizes the bottles and uses that to pump the liqour out, which then goes into your drink. It therefore produces whatever drink you want on command. The mixer device is reprogrammable via a PC to put in your favorite mixed drinks, and the thing uses a CO2 tank to pump out the sweet, sweet candy.
At $750, it’s a bit too expensive for my tastes. However, they offer a $550 DIY kit, which seems like it would be an excellent addition to a home bar.