Picked up a bottle of Alaskan Birch Bock based on a sample at the St. Paul Summer Fest a few weeks ago. I have an affinity for "tree" beers after helping make a spruce ale with the MN Home Brewers at the first Teach a Friend to Homebrew day in 2005. The experience helped me get into homebrewing more, so "tree" beers have an odd emotional appeal to me.
Classic doppelbock color: deep copper to ruby. Dirty white head falls quickly over alcohol hotness and deep malt with a clear birch nose. Dark fruits and malt are smoothed by a slick oiliness over, what I assume, is a birch spicy note since it's low on hops. Very fun to drink.
Not a knock-your-socks off beer, but a testament to the creativity of the beer world. I like it and would drink it again.