I haven't played Windows Solitaire for quite some time, but you'd be hardpressed to find somebody who hasn't spent more than a little time on the little Card Game Who Could. B3TA's interview of Windows Solitaire creator Wes Cherry reveals him to be quite funny and modest about his creation, that most casual of casual games, arguably the most-played game of all time. I'll leave out the requisite jokes about lost productivity, but there's some neat information in this interview (people hate Vegas Mode? Unthinkable!).
My favorite question is the first:
Are you bitter at not being paid for such a popular and essential utility?
Yeah, especially since you are all probably paid to play it!