Nice page, although a bit out-of-date... For example Demon Dogs was kicked out of their spot under the el sometime last year (the building was owned by the CTA and was going to be demolished). I have no idea where they went or if they're still in business, though :/
Also most people I know call it a "gaper's block" and not a "gaper's delay" (even if it's not a total block of traffic...)
If you want Chicago food, you can actually get Chicago pizza, italian beef, and hot dogs delivered anywhere in the country!

See here:
http://www.thebestofchicago.com/productcart/pc/viewcat.asphttp://www.giordanos.com/shop/home.php?cat=1 (my favorite stuffed pizza)