I don't know how many of you are familiar with those guys, but to cut the long story short they are working on "computer-controlled LOX/ethanol rocket vehicles". Their site is here and it documents the stuff they've been doing over the years.
I'm posting this because there's an awesome hover flight video of one of their vehicles, complete with onboard footage and multiple camera angles. A treat for any rocket aficionado.
There are two recent videos posted on their recent update, this is the one I'm talking about specifically: http://media.armadilloaerospace.com/2007_06_03/LLC1demo.mpg.
You just gotta love stuf that defies gravity!