It is sometimes easy to miss out new comments to blog posts if you don't log in for a while. Of course, you can have e-mails sent to you, but I would prefer to have an option of "Show New Comments" on one's own blog page, which would list the blog posts where new comments have been since been added.
Another function for forum members would be a similar notification if anybody posts in somebody's game forums. It is too easy to not notice any posts in there, unless you regularly check every single hub entry. Now, I would suggest this to be likewise a members-only bonus (because of the extra effort), but it would be appreciated. It could likewise be under a "Show New Forum Posts" link. That way, you can't miss a single question, comment, or bug comment on your forums. :-)