1. Add a shout-box/open chat on top of forum.(I wish a helpfull item for those who need an urgent help or which not bigger to post it &wait for the replay and get more suggections).

Chat needs moderation nowadays and I don't think there would be enough volunteers for that kind of boring task.

2. Easy Bug Reporting thread.

What the problem with SourceForge.net one?

3. Edit button in post thread & cancel/edit button for file/image links.

I just added you to the group of users who are allowed to upload images and edit their messages.

4. New forum gallery which shows only Image in thumbnail and uploader name. On click full size image & its comment.

Feel free to create and maintain a thread that presents the nicest projects. Once ready, I'll change its status to be a sticky thread, so it will appear at the beginning of threads list.