At the risk of being berated: Final Absolution (by Dragonmead which is technically a microbrewery... but the OP did say "commercial", not mega distributor)
Bad Frog
Old Numbskull
Slobberknocker (Capital Brewing Co.)
Rusty Roadrunner (Sweetwater Tavern)
Kilt Lifter
Hairy Eyeball
Bell's Hell Hath No Fury
And my favorite name (from Scotland I think)... Frog Island Croak and Stagger
Ten Fidy Imperial stout (oskar blues brewery) cross-eyed, Cyclopean, Canupiscent
always seemed pretty clever to me, Thier Old chub beer is great as well
Bob just mentioned this one- Floppin' Crappie Ale. A friend bought us a 6er because the name and the label were great. The beer, unfortunately, sucks. So we have a decorative 5 pack for our cottage.
Check out Syracuse's Middle Ages Brewery. They have cool Middle Ages themed names like ImPaled Ale, Beast Bitter, Druid Fluid Barleywine, Wailing Wench, and Wizards Winter Ale. Great beers, too. Here's a link: http://middleagesbrewing.com/