The Wolfram Alpha “intelligent search engine” that we mentioned here and here is back in the headlines today. The cause for concern, or in this case interest, is that Wolfram Alpha has decided to lower the price on their iPhone app for the holiday season. Starting today and running through the end of the year, Wolfram Alpha will now be on sale for $19.99 — much more reasonable than the previous $49.99 dragging behind the app like a lead weight. Like many...