I found this 2-deck super-solitaire game in a little 25-cent used paperback about 20 years ago. I played it the old-fashioned way until it came to the computer. Windows bundles it (at least XP did -- don't know about Vista). Now it's therapy for me because of my slow connection speed. When I get on a roll, I can't just sit here and watch the hour glass, so I keep Spider running in the background all the time to play while web pages load. BTW, one of our former presidents -- FDR I think -- played this game.

I've logged so many hours on this game I've even created how-to pages for my website. I only play the difficult version (4-suits).
http://countrynaturals.com/spider-solitaire.htm