It's nice and all, and i realise that if you've chosen a strong password the odds of anybody bruteforcing this hash is very, very, very close to 0.
This being said, i'm always a bit sceptical if a newbie enters the forum with an account that can be thrown away in a heartbeat and offers a very big reward for about any task... IF somebody actually succeeds, and by doing so helps you improve your security, what's stopping you from just logging out never to return to bitcointalk using the same account?
If you offer a reward, it should be helt in escrow by a trusted forum member... At very least you should give proof of funds (altough this is not sufficient imho)
This being said, i'm always a bit sceptical if a newbie enters the forum with an account that can be thrown away in a heartbeat and offers a very big reward for about any task... IF somebody actually succeeds, and by doing so helps you improve your security, what's stopping you from just logging out never to return to bitcointalk using the same account?
If you offer a reward, it should be helt in escrow by a trusted forum member... At very least you should give proof of funds (altough this is not sufficient imho)
I wouldn't recommend brute forcing, unless you have several powerful rigs at your disposal. Word lists + rules are usually better. And I know my account is "noob" but I have been around a while, albeit with low activity. I've been more involved with mining forums, than bitcoin general.
What's the point of word list + rule to perform dictionary attack (unless you forget your password but you still remember words and pattern/rule you might used) ?
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A middleman could be used to easily solve this issue. 
- OP sends the wallet.dat to the middleman
- The cracker sends the password to the middleman
- The middleman unlocks the wallet, sends the 1 BTC to the cracker and the remaining to OP (minus fees).
Everybody gets happy!
Past thread with similar "challenge" usually don't want to use escrow/middleman, so i doubt it'll happen.