I am so jealous!!!!
Blizzcon is on my bucket list lol!! I still play (For the Horde!), and many of my guildies help support my weight loss
I'm excited to see what they announce as far as the next expansion, and I'm hoping to hear more about Hearthstone, as well (I used to play Magic: The Gathering too, so Hearthstone will be a win-win for me!). I have all the WoW soundtracks on my ipod lol! Blizzard does amazing music for their games!
I'll be getting the DirecTV package (I'm a pet collector...542 unique pets and counting!), so I'll get to experience some of the fun stuff, but I'm sure it can't even compare to the pure awesomeness of actually being there with thousands of others who share(d) the same hobby as you!
I'm not sure if you follow WoWInsider (wow.joystiq.com), but they usually do a party on one of the evenings with a bunch of their writers, fans and guildies, and from what I've read people have so much fun that even if they don't get a ticket to blizzcon, some will travel to Anaheim that weekend just for that party lol!
I really hope you have a wonderful time!!!