A lot of these are just guesses, just so you know. I didn't look at any other posts before I replied.

1. Name at least three people who betatested blur's Treasure Hunt pack.
Cooba, FireSworD, and CelL.

2. How many Anniversary Bashes did blur organise?
One?

3. What clan is he leading at the moment?
[si] - Semi-idle

4. What is his real name (or at least the name he told it's his once in a server)
Michael

5. In 2002, blur began a fansite revolving around one of the most popular community members. How was the site called?
Tyf's Fan Club

6. What's the gametype of the multiplayer pack blur is creating?
Treasure Hunt.

7. Which prize did blur win in stripe's CTF contest?
Money.

8. What's his weapon of choice?
RF missiles.

9. One of his levels says that it's dedicated to a well known community member. Name that member.
Disguise.

10. Recently blur's been facing problems with a certain JJ2 player. What was the exact problem?
Cooba, making posts like this.