At present I do not have a kegging setup. I've seen The Party Pig a few times at the LHBS but never really paid attention to it because I thought it was something like a Mr. Beer kit. Recently I looked a little closer and saw that it is simply a beer dispensing system, sort of a keg-lite system, if you will. It only holds 2.5 gallons, so I'd still bottle the other half of a batch, but it looks like it has potential. My first thought was to get one so that I could bring beer to a gathering or give beer to someone (expecting to get the empty container back, of course), but it looks like something that would fit in my fridge very nicely.
Basically I was wondering if anyone uses these, or knows someone who does. They look like they're about $50 or so, plus the time, effort and money of a half batch of beer to find out how well they work, so I was wondering if it was worth trying out. The way it works is that it has a special pouch that inflates and maintains a constant 15-20 psi internal pressure for dispensing. You still need to add priming sugar and let it naturally carbonate.