I read your blog and I agree with all of your reasons. The only problem many see with forums is that they have to wait for an answer most times. In this day and age of instant gratification and fast foods, not many are willing to wait for anything anymore...alot of people would rather use one of the Instant Messaging services currently available.
For the diehard, or dedicated users, forums will always remain a viable way of interaction with a group of widely diverse people all over the world.
I agree with what you have said. Also, during breaks from school, I tend to write more thought out posts to keep my mind and writing skills fresh, so my brain doesn't turn to mush.
Firstly, they help me to be more articulate - on paper at least! I can write reasonably good discursive essays, and owe this to play-by-post role-playing games and forums like this one.
Secondly, they force you to develop opinions on controversial issues. I've read/written pages and pages of arguments on issues like abortion, gay adoption, the death penalty and so on, so I'm able to make cogent arguments when I come to discuss such issues in 'real life'.
Thirdly, they're good for moral support and/or advice. If you've got genital herpes or something, you might not want to discuss it with your friends, and a forum is somewhere where you can talk through such issues, get advice and hear others' experience.
You can write things instead of saying them. Then you have more time to think of what to say and don't have to feel like a moron.
Its quite good, pretty interesting, nice work