Anything over 100 on the IBU's in my book...

Favorites:

Russian River - Pliny the Elder Double IPA and Blind Pig IPA
Anderson Valley - Hop Ottin IPA
Bear Republic - Racer 5 IPA Racer X Double IPA
Stone - Ruination(as in your palate) Double IPA
Mad River - IPA
Lost Coast - Indica Pale Ale
Lagunitas - Maximus
Green Flash - West Coast IPA
Maui Brewing - Big Swell IPA
Port Brewing - Anything there really
Rubicon Brewing - Hop Sauce

Seek out and you shall be rewarded with hoppy goodness.