Our own Dave Caolo pointed out something that took the rest of the TUAW team aback: at US$29.99, Mac OS X Lion was the most expensive product discussed at WWDC today. It's not as though the next version of the Mac's operating system had a lot of pricing competition at the keynote. iOS 5 will be a free upgrade to users with supported hardware, and iCloud's services -- which used to cost $99/year under MobileMe -- are all completely free. In fact, other than Lion itself, the only thing Apple announced at WWDC that costs anything at all was
