Venus flytraps
Katzenklavier
Regular
I got one. Man these things are fucking cool. I fed it an ant, and I could see it wiggling around inside the trap. I don't feel bad though because I don't believe ants are conscious. Plus it was trying to eat my snickers bar. 
Comments
Also, don't stick your fingers in there - they go brown.
you dont need to feed it, or move it to a large pot, but it is important to give it lots of pure water, such as distilled, or rainwater. tap water is ok for a few weeks, but eventually the salt levels build up to an unhealthy level. people dont recommend this, but i have had limited success with using tap water, then just running it under more tap water every month or so to leach all the excess minerals out.
hibernation is optional, but your plant would probably die out in a few years if you dont let it get any rest.
obligatory photos:
That one on the right has a fly inside of it. That is so badass.
They're selling them over where I live. I could mail you one. It'll survive through the mail.
I found this while looking at purple pitchers. This is what it was. It wasnt purple though.
Now that is beast.