Wow, Ian's ranks with the best pizza I've had in Florence, Rome, Boston, and San Francisco. The crust is perfectly chewy, thin, with a hint of sourdough. I'm fairly picky about pizza crust, and Ian's crust is amazing.
Toppings range from the fairly traditional to the quirky. Open late. Atmosphere is very much a college hangout--fun in a very casual kind of way. Definitely on my list to come back on my next visit to Madison.