Well for starters everything is a big pile of unrelated posts; videos, blogs, questions, suggestion, etc.. Making a new sub for suggestions will be just the start of a future more organized main community. I know the forum is small right now, but I'm pretty sure this will change once you guys accept more beta testers, and eventually release. I think is important to have a sub solely dedicated to community feedback and ideas.
Likewise in the long run it would probably be good to also have a separate subforum for the user videos, blogs and stories. I had a hard time picking the correct place to post my beta diary in - it's beta content so it doesn't belong in the main forum but it's not really questions or feedback either.
Good suggestions. I'll mull them over and speak to Jon + team about it if they haven't already made a decision (darn this 16 hour time difference).