I don't mean mixing a Guiness and a Bass. I mean a brew that comes in it's own bottle. Ala Saranac, Yuengling, Mississippi Mud, Bodacious, Director's Cut, etc.. Are they losing popularity? Or are people just combining their own beers to make their own B & T's? For those making their own, here is a list of concoctions you can try: http://www.homebrewtalk.com/wiki/index.php/Black_and_Tan
Berkshire Brewing Company's "Shabadoo" Black & Tan maybe a month ago just for the hell of it. Great beer for someone who doesn't feel like concocting their own.
Yes, a Yuengling several months ago. Once and done, never again! BTW, I like a properly done Guinness and Bass.
I once did a 50/50 mixture of Old Rasputin and Hop Wallop... It was a complete waste of 2 great beers.