i have recently discovered, by means of being stupid, that while looking through the comments on a digg article, you can actually raise the comments rating by 3 thumbs up, however this does not work with the main stories diggnumber or with digging down, but you can raise comments by 3 points, so yay for me. BTW i'm sorry if somebody already figured this out and i'm the last to know, but hey it was worth a mention.