What is the typeface?
I don't know the name of it, there's 10's of thousands of fonts out there.
Not one I've used myself, but I think it's in one of the type foundry books at work - Font Font, T26, Monotype, Emigre....
It's quite common these days for typeface designers to include 'quirky' elements (eg, mixing upper and lower case) in their fonts - ie, not your Times, Helvetica and Ariels etc.. which were designed a long time ago.