another Eric A Meyer (who happens to be a more prominent web designer than i am (you’ll find him, not me, if you google us)) made a google maps air strike simulation called HYDEsim. it shows on a map the basic range of an explosion using variables that you set.
he’s recieved some flack for ‘aiding the terrorists’ (ha), or the simulation being to simple (it doesn’t take into account some wider effects of an explosion), etc – though he points out that it’s not an easy thing to mock up with simple javascript.
it’s a nifty little learning tool, but more interesting to me is his recent blog post about it, talking about various places it’s been used and various people’s responses to it.