DonWii on 24 May 2008
It has trailers for all of the WiiWare games that are released, which is helpful if you have no idea what the game is about.
Some trailers are available there before they are available online, like TV Show King and VIP Black Jack.
There are trailers and info videos. The info videos are usually not readily found on the internet. Same goes for the interviews.
They also have short clips for all (I believe) VC games that are available.
It also has a list of releases for the coming weeks, though it isn't perfect(Blast Works still hasn't released, though it was suppose to release a few weeks ago).
