I started this topic because I was seeing some hints of it being discontinued around the Internet from a few retailers.
This Amazon listing says the manufacturer has discontinued the product.
http://www.amazon.com/LEGO-4494799-Mindstorms-NXT/dp/B000E4FDAE
I also found a Walmart listing in Google Cache that said the same thing, although if you go the Walmart web site it doesn't say that anymore. I even saw a few eBay auctions that said the same thing, although there aren't enough grains of salt on earth for me to think eBay auction listings are reliable sources of info.
What got me really wondering is that the prices for this set have skyrocketed in the last week or two on Amazon (who doesn't sell it directly anymore as of last week) and eBay. This could be a supply and demand thing due to LSH being out of stock right now. I've haven't been back in Lego for long enough to gauge the market forces at play here.