After Neil Armstrong's death, the developers of the game put a memorial to him on the Mun, at the latitude and longitude that Apollo 11 landed.
Just before version 0.21, Kurt J Mac embarked on a mission to bring all of his errant kerbonauts home alive. Across a three part episode, he pulled this off with style. Many people, moving from one version to the (save-incompatible) next would simply leave their Kerbals where they were and move on. Kurt took it to the next level when he successfully retrieved everyone from various edges of the Kerbin-sphere.