It's the same strain Anchor uses to ferment Liberty and White Labs does offer it under WLP051 California V Ale Yeast. I have used it once and it came out pretty nice, it does have some esters so you will want to keep it cool if you are looking for a really clean american ale.
Nice. I went out tonight to pick up a sixer of the Liberty Ale. It was interesting, because I had my American Ale II starter going, and the Liberty Ale in the fridge. It's really uncanny how much alike the two smelled, all things considered. When I first popped the top to the Liberty, the smell coming out was a dead ringer for what was emanating from my flask.
Regarding flavor, the Liberty Ale is quite good. I was looking for, and found, some of the slight nuttiness and fruitiness. Really a nice brew, especially after it's warmed up a bit.
I'm hoping that goodness comes through in the American Brown I just pitched it into. Then, subsequently, in the IPA I have planned next. If this strain is half as good as I think it might be, then it's a definite keeper.