Apple has been a little vague on the features of iTunes Match.  Most of what we know came from the iCloud/Lion Keynote this past summer.  To complicate matters, the press has been stabbing in the dark to explain exactly what iTunes Match does since day one.  Now that it's out, we've had a chance to play with it and answer all of our nagging questions about the service.  We've determined it's definitely worth the $25. [...]