Doug Marks over at Metal Method has posted a great video, shown above, of Metal Method instructor Dan Mumm playing an impressive version of God Rest Ye Merry Gentlemen. It starts out pretty straightforward, but once he gets into the eight finger tapping, look out! Doug has also made available the backing track and tabs to current students who want to try this out.
If you haven't tried Metal Method, it's a great course for classic rock, blues and heavy metal. Doug Marks is not only an exceptional rock guitar player, he's one of the best instructors out there. The Metal Method Course has six DVDs and is a tremendous value for $85, or you can get just two DVDs for $25 plus shipping.
There are also newer courses on Lead Guitar DNA, Sweep Pick Mechanics, Melodic Principles of Rock and Speed Kills 2010. There are also many sample videos on YouTube.