This is very sad news, and my sympathies go out to the Armstrong family.
Of the original 12 moonwalkers, only 8 are now alive. Armstrong died yesterday, Pete Conrad in 1999, Jim Irwin in the 1980s, and Al Shepherd in 1998. Gene Cernan, the last man to walk on the moon, has stated several times that he thought, before the year 2000, there would be many more men (and women) to walk on the moon. Nope.
I believe a statement from Armstrong's family also requested, when you look up at the moon, remember him and give him a little wink. The world lost a great hero, and I think he's deserving of at least that.
EDIT: Awesome 1970 interview with Armstrong I found that I think is a great piece to remember him with:
http://www.youtube.com/watch?v=PtdcdxvN ... ture=share