I've recently bought a bottle of Absinthe following a visit to St George distillery up the road in Alameda. I'm a serious Scotch drinker, and while this is no substitute I have to say this stuff is awesome. Admittedly, I'm also a fan of black liquorice which I think would be compulsory if you want to enjoy Absinthe. Bottled at 120 proof, but I don't mess around with sugar cubes. Just half an ice cube dropped in a one to two-ounce pour. A whopping hit of fiery liquorice, but lovely subtle herbal notes too.
St. George Spirits :: St. George Absinthe Verte
It's never going to replace whisky, but it makes an interesting alternative now and again. If you're looking to try some I would HIGHLY recommend St George's stuff at about $60 a 750ml bottle, or a 200ml bottle for just over $20 if you're not too sure.