US faves, which happen to all be punk bands:
"Jon Cougar Concentration Camp" (as Ad Nauseam said. They also tend to have some of the greatest album and 7" names ever, like "Asparagus in a Material World" and "Victoria's Secret Sauce." Now broken up, they were one of my favorite bands of high school days)
River City High (based off one of my favorite NES games, though I don't care for their music much)
"The Wynona Riders" (yes, the y's and i's are in the right places)
"Boris the Sprinkler"
"The Ducky Boys"
"The Chinese Millionnaires"
And when in doubt, look to Japan. They have some of the greatest English names, partly because they like to throw random English words together:
"Bump of Chicken"
"The Yellow Monkey"
"Hermann H. and the Pacemakers"
"Fantastic Factory"
"The Brilliant Green"
"Soulsberry"
"Luna Sea" (originally "Lunacy," but the pun is better.)
"SADS" (look up the definition somewhere on the web)
"hide with Spread Beaver" ("hide" is actually pronounced "hee-day," now defunct band because the front man, hide, killed himself)
"Guitar Wolf" (it's even better considering the guitarist/singer, bassist, and drummer are named "Guitar Wolf," "Bass Wolf," and "Drum Wolf.")