First, the same reasons the others want to go: It is the best place to learn about the present and future of software development for the Microsoft platforms (although, a Geek Cruise would be good enough ;)).
Second, the place is going to be filled with bloggers I read every day. Some of them are like rock stars to me. I want to meet them in person for once. By the way, is the Don Box Band playing this year?
I have never been in such a major event, but in local dev days in Argentina and in conferences in the Dominican Republic.
If I win, however, I would like to buy a Tablet PC and blog the PDC in real-time, but in Spanish (yes, my Spanish is WAY BETTER than my English). That would be, I think, a nice way to share the gift with the community.
I can think of other ways. What about writing some code with the new tools and publishing some articles in both Spanish and English? Well, were you going to ask me for proof that I can actually do that, you would put me in trouble because I am not doing it at present. But I know I could do fine.
Ok, I know I am not going to win this contest... But, what the hell? Choose me!!!