This article, video, and paper should be up a lot of people's alley. It discusses the physics of Guinness beer, and tries to tackle some very profound questions:
For example, look closely at a pint of Guinness and tell me: do the bubbles go up, or do the bubbles go down? Why is the head coloured the way it is? Is beer foam a gas, liquid or solid? I thought you might enjoy this little video as a follow up, where an Irish physicist discusses the "fizzics" of bubble formation in Guinness beer.There is a video link to the article, which I will also link to here:
And the paper that was published in Physics of Fluids (I kid you not) can be obtained from here as well.
 M. Robinson et al., Phys. Fluids v. 20, p.067101 (2008).