My 2 cents.

Well I can't speak for everyone as some will disagree, but I think we all participate in one form or another for the fun of it and not all this haggling and disagreement.

I'm sorry but I just can't see myself bogging down my computer for hours so that I can't really use it for anything else just to have the lowest score because there is no time limit and I really want to win at all costs.

I would suggest that the challenges be limited to challenges that normal optimized proper coding techniques can complete within 30 minutes on a P4 800Mhz 256MB system.
Then any Golfing code must complete within 1 hour.
If your code can not complete within 1 hour then you need to come up with some other type of code.

This would allow Jens or others to validate entries properly within a reasonable time frame.
If you had 10 entries of code that took 3 days each to run it would take a month to validate the code which is just not reasonable.

So - my suggestion is any submitted Golf code must pass the scoring engine and complete within 1 hour period.