I've been using the mail client Mozilla Thunderbird to manage my RSS feeds and I've noticed that the new video feed doesn't update often at all. According to the feed there were six new videos on the 4th and only 4 on the 30th of last month. There have difinately been more videos than that though. I'm not sure what would need to be done to make it update more often...
About the number of articles per thread... a fansub distrobution site uses as many as 20 but the number was actually dynamic based on how many entries they had within a certain time. ESPN had about 15 and I saw one news website with about 30. Most seem to be close to 10 though.

