I promised a follow up to the Ars Technica article on purifying proteins, and here it is. This lecture by AK lectures is excellent. He explains how each method works clearly (This is gel filtration, but there are links here for Ion Exchange and Affinity, as well, which should cover the other methods well enough that everything discussed in the Ars Technica article is reviewed well. The only thing I still want to find is the actual equipment used, so I'll be hunting for that next.
Ladies & Gentlemen, this is why I argue that anyone can be an auto-didact. We can all learn anything we set our minds to! The tools are there! That's why It's The Small Things exists - I wanted to make it easy for us to find and use them!