Displacement Brewers
Maybe they're not 3rd-wave enough, but it would be interesting for James to do a short segment on Displacement brewers. Ironically, I'll bet that by far, the largest number of gallons of coffee brewed per year by type of percolation machine in the US are brewed by displacement brewers. Mostly in restaurants/diners/cafes but a few of us also have them at home such as the Bunn Speedbrew series. I'd like his expert treatment of those.
Edit: I incorrectly referred to displacement as a type of brewer (see below, fixed in the above). But James does segments on all methods of percolation type brewers, even ones with tiny variations in method between them. Seems like this method would interest folks, especially because it is so widely used and so little discussed.