The patent in question is http://www.freepatentsonline.com/7640098.html (source: http://news.priorsmart.com/stenbock-everson-v-runwayfinder-l... )
To summarize: it's a patent on the idea of overlaying a flight plan on a map using a website. The general case of this is drawing line-segments on a background, something every trivial paint program can do. This patent clearly fails the obviousness test.
Every patent I've read (IANAL, but I have read a number of patents over a couple of years of helping our lawyers challenge the USPTO) requires very careful reading to understand and evaluate all the claims.