Things and stuff (as well as the reverse)
"The current market price is $55 a pound (in 250 pound lots - it fell as low as $14 a few years ago) and Gen-IV technologies will allow U238 to be used as well as U235, increasing utilisation by a factor of 50 or so. David MacKay's sums suggest that there's easily enough available to supply electricity for 1,000 years or so."
Is that $55/pound figure based on the price of the fissionable uranium itself, or the processed fuel pellets? Big difference... If I recall correctly, most reactor fuel in the US (except, maybe, the small amount of MOX we use) is around 3-5% U-235. That being said, the price of fissionable uranium is a drop in the bucket compared to the cost of building and decomissioning nuclear power facilities.
As for U-238 being "used," it's a little more complicated that that. If, and again I stress that if, my recall is accurate, the method does not involve the direct fission of U-238 (which is not a fissionable isotope), but rather, the deployment of U-238 in a shell surrounding the reaction mass, so that by neutron capture some of the U-238 is transformed into a fissionable isotope (Probably Pu-239) which can be reprocessed into new fuel rods.
Blah blah blah blah blah
And other things
The blue scientist-type fellow because that is the type of person I, in my undereducated hubris, seek to emulate. Giggity.