Brown Sharpie is an excellent mathematical cartoon series by Courtney Gibbons - it's like xkcd, but much brainier ;) This one above is a classic about how to pronounce the Greek letter psi: Link
And by the way, my graduate thesis was on a yeast prion called PSI+, and I say "psigh" which would make me tainted by a pretentious physicist.
P-sigh, huh? Maybe I should have added an option for folks who have had their brains addled by idiosyncratically folded-up yeast proteins. (Eww, biology! ;) )
My personal favorite is my pal who pronounces it "Siiigh" preceded with a really deep breath. She always manages to sound so depressed about it. I guess she's sad we already used up phi (pronounced "fee," damn it!).
Also, saying a comic to be 'much brainer' than xkcd is a big claim! (Granted, an illustrated physics manual could be considered 'brainer', but if it's not funny, it's not really a 'brainy comic').
Lew