I've long said that would be a good idea for the fourth movie, unless they did something with the "Young Indiana Jones Adventures." And now they've cast a 20-year-old. http://www.cnn.com/2007/SHOWBIZ/Movies/04/13/people.shialabeouf.ap/index.html
Not that I try to second guess movie choices. I'm just happy that Speilburg and Ford are involved so the dialogue won't suck like it did in three recent Lucas films.
There is a new renaissance festival in Louisiana! Check out the Acadiana Medieval Faire at: http://www.acadianafaire.org/