Just a reminder to stateside owners of the earleir pokemon games, Gamestop is giving out Shiny Enteis this week, used for unlocking Zoruark, and later they'll be passing out shiny Suicunes.
If you didn't get shiny Raikou, then you've already missed your chance.
@Badass:
Oh, also, since fuka-chan mentioned pre-ordering, does anyone know any good places to pre order the game? And also, is it worth it to get both versions (as I've seen some people have done with previous games)?
Generally not. There's only a handful of critters exclusive to each game, and usually you can get them through trading pretty easily, especially with the advent of wifi. Just make sure you coordinate with any local friends and get opposite versions. Looking at your desired team, you should probably go for Black, it has the plant sheep thing and the vulture.
This time around the games have a few more differences than usual, but still nothing huge.
Rather than get two games from the same gen, you'd be better off getting a copy of a game from an earlier gen for easier access to those critters.