Just getting around to this thread, but absolutely want to echo CDu's sentiments. Tennis fans have been waiting a whole year for this - the Rafa/Djokovic rematch in the French Open, a year after they played one of the greatest matches ever on clay. (unfortunately it was in the semis, but was really the de facto final)
I've really picked up my tennis watching the past several years and would agree they are my two favorites now to watch on tour. Personally, if I were starting out (and actually athletic), I would model my game on Novak's. Nadal is just a freak of nature, with his crazy left-handed top-spin RPM's and crazy desire for every point*, while Djokovic plays with such crisp precision and astonishing defensive skills - either one is something special to watch. [Back in the day, Federer's ability to effortlessly glide above the court was right up there as well]
Anyway, back to this match - these 2 have now met the most times head to head in the Open era. And it's an extremely tight race. Furthermore, they've constantly pushed each other to become better players - out of necessity. Watching them go back and forth the past 4 years, adapting and re-adapting to each other's games is pretty awesome. Djokovic can now consistently handle the uniqueness of Nadal's game in a way that very few other players can.
I am absolutely stoked for tomorrow - I'll be pulling for Novak given the disappointment of last year (up a break in the 5th when he foolishly/accidentally ran into the net, giving away the game, and eventually losing the set 9-7), and the fact that it would put 3 current men's players on the tour with career grand slams (absolutely ridiculous). I do feel bad for Rafa though, given that his back problem in the Melbourne final essentially cost him a 14th major and double career slam. So let's hope tomorrow is more in line w/ the Australian Open 2012 final, not 2014. Well, maybe not quite as long...
* Jimmy Connors had a great line about Nadal: "He plays like he's broke."