I've never found an aluniminum taste in any of the micro-brew cans I've had. I'm a big fan of the light blocking and weight saving properties of the can vs glass and as such I did a lot of research into cans a while back. I couldn't convine the Boss we needed a canning line though (and a trailer load of cans and lids). ;-)
More generally, there are plenty of fine beers in cans including (but not limited to) New England Brewing, Oskar Blues and Sly Fox. As I said before, none of the cans I've tried had that aluminium flavor you get from some cans like the small cans of V8 or orange juice on an airplane.
A-B, Heineken and Guinness sell a boatload of cans! When was the last time you heard of one of them tasting like aluminium? I take Heineken cans camping as a can wieghs about 7oz less than a bottle and you never get a skunked one. I'd prefer to buy New England Amber but, alas, it is not available in Maine.
Jon Hill, Brewer
Atlantic Brewing Co
jon at atlanticbrewing dot com