How can I get notified of announcements here

I think all you'd need to do is click "Forum Tools" ( in the grey bar just above your thread post in the forum) then choose "Subscribe to this forum" I think you'll be given options on the frequency of new post email alerts after that.
Is there any way to get instant notifications? On some other vBulletin forums there's an option to receive instant notification which really helps for server notices.