Apple certainly took its sweet time releasing iTunes 10 yesterday, and we're beginning to think it's because the company was making a last-second change to its new Ping social-network-for-music: the removal of Facebook Connect for finding friends. Seriously -- although an option to find friends via Facebook was conspicuously present during Steve's keynote demos, it's not there anymore. Oddly, the option was there at the very beginning -- several Engadget staffers definitely saw a Facebook button when they signed up for Ping last night, and there's a whole threa