I have only heard of a few truly albino dobermans. that one is just white. some breeders call it the isabella doberman. they market it as rare and charge outrageous amounts for them. they are rare only because responsible breeders neuter every dog in the bloodline, as was mentioned earlier. they are very similar to all white great danes in that the majority are either deaf or blind, or both, and all of them have severely lowered immune systems. even the faded colors such as fawn (faded form of red) and blue (faded form of black and tan) dobies have very lowered immunities, and they are very prone to a skin disorder (dont recall the name) in which they go bald, usually begins on the haunches and spreads forward. they believe that disorder is because in a faded color dobie the hair color is faded because it has less of the pigment (molecules?) and is always a very very fine fur. they think the fine-ness of the hairs makes them a lot more prone to become ingrown, causing infection in the hair folicle, which basically prevents the folicle from creating new hairs.
I learned all that from talking to a bunch of breeders, 2 rescuers and reading a lot about dobermans last fall when I was considering getting one.