It's only a couple of months (America gets it on the 27th, we get it October 26th) or so until the Metroid Prime saga concludes and the Wii gets what looks like one hell of a good adventure/shooter. To build up the hype for it, GameTrailers is running a series of original videos looking back at the games that make up the Metroid series.
It's pretty well done, and definitely worth a look at if you don't know the background to Metroid Prime 3 or just want to know the history of the series.
Part 1 - Metroid + Metroid 2
Part 2 - Super Metroid + Metroid Fusion
Part 3 - Metroid Prime 1 + 2
There was also a new trailer released today, which you can see
here.