Those were cool a few years back but if you want to see a great flight planning site, go to fltplan.com. It is wicked awesome and most of us out there in the 135 and part 91 world are using it to file our flight plans. It has great flight planning functions with winds aloft that are very accurate and it computes flight time and fuel burn. You can choose from pre-loaded performance data for a bunch of different airplanes from a Cessna 152 to a 767 or you can load your own data in. The weather function is great too and you can put your route of flight up with radar and plan accordingly. Best of all, it's free(for now at least).
Too lazy to work, too scared to steal!