I don't know that the info is out for the class of 2010. I believe that 90% of the class of 2009 got their first or second choice.
Also, please realize that what happened this year isn't necessarily relevant in terms of what will happen 4 yrs from now. The higher in the class you stand, the more likely you are to get your first choice. Your odds may also depend on what your first choice is (which community) and how many slots are open in that community in your year. Finally, today the choice is more "mutual" than it was in my day -- thus, if you want to be a SEAL, the SEALs must agree to take you. This is true of most (if not all) communities.
Regardless of which SA you select or even if you go ROTC, you're in the military and the "needs of the military" always come first. You can do everything right and the military (USN or otherwise) can decide what happens to you, which may or may not be what you want. Welcome to the military!