Some changes to the Jungle Cruise cruise spiel are currently scheduled to debut around November 15 2009.
Around 90% of the spiel will remain the same, but lots of new material will be available for the skippers to use. Some of the new material has been brought over from Disneyland, along with all new WDI material. Don't worry though, all the classic lines will remain with the exception of the "inspires you to go..." line at Inspiration Falls. That one has been reworked to be somewhat less potty humor based. In the new script, Chief Name is also reverted back to his original name of "Trader Sam".
I've been told that most guests aren't going to notice much of a change, but for those of you who are big Jungle Cruise fans, look out for some great new improvements to the spiel come mid November, and maybe more next year.