• Topic subscribing
It'd be great if we could subscribe to topics and be notified when there's a new thread rather than having to check each one manually, or have a BB feed showing all new posts/threads (for admins).
• Auto-subscribing
Most modern forums automatically subscribe to/watch threads that they post on, so that'd be neat.
• Change "SUBSCRIBE" to "Watch thread"
Self-explanatory, but I guess it's just a nitpick.
• Fix subscribe button
Self-explanatory again, pressing the button just reloads the page and doesn't actully subscribe.
• Fix poster badge
It disappears every night after making a post and doesn't return until you make another, the cyle repeats.
Also, @Rlad116 suggested that these updates (the first and maybe second, I'm assuming) would be great for blogs.