This is from Colin’s Running adventures – on how he managed to run 50 miles all on his own without training :)
http://www.bryar.com/running/run-50-miles.htm

Training advice from a coach
http://www.trainharder.com/2007/11/28/ultra-marathons-do-you-have-what-it-takes/

And of course eating on the run – http://www.trainharder.com/2007/11/09/eating-on-the-run/#more-303

Ultramarathon training
http://www.lupusrunner.org/2007/09/weekly-statistics.html