http://www.vgchat.com/arcade.php?categoryid=-1
Hunt through the categories, and if there are games in the wrong categories, post the game name and where it should be. A few could be in two categories, like some of the classics.
[url=http://www.vgchat.com/arcade.php?do=play&gameid=342]Driving Mad[/url] is a golf game so it should probably be listed under "sports".
Haven't noticed any others out of category.
A major problem though...
When a game is played for a long time, VG Chat will automatically "Log Out" a member because apparently, when a game is being played, the forum thinks you are "idle" or not currently active on the forums.
This will kill any chance of playing a lengthy hi-scoring contest since when the game is over and you submit the score, VG Chat asks you to "Log In" again and afterwards are redirected back to the main arcade page without the score being submitted.
Or at least that's what it did for me.