Everyone harping on abotu Bug types seems to be quite forgetting the frankly awesome and rather dashing Scolipede!
I'm excited about Dragon having another weakness, and Fairy being strong against it does make sense when you use your brain. I'd also like to find out what it's other strengths/weaknesses are. I'm expecting that it will be weak to fire but strong against dark.
I think that a couple of electric types (Ampharos for example) will get the upgrade to Fairy type aswell since there are lots of pokemon that are just electric(Thought I ought to throw this opinion in as no one's mentioned it really)