(Public service announcement) We want to show our U.S. Ski Team how many of us are cheering them on as they chase our first cross-country Olympic medals since Bill Koch’s silver back in 1972. To get the ball rolling, a donor has pledged to donate $1 to Boston & New England Nordic programs for every comment posted on Noah Hoffman’s blog between now and the opening ceremonies in Sochi. There’s more on the pledge at the end, but first, here’s how to leave a comment...