I'm somewhat undecided on this program - on one hand, it's a neat programming exercise and a potentially very useful utility (everyone who's forgotten a password raise their hand now), while on the other hand it breaks the password protection feature which people may want to use to hide secrets or protect their own levels from casual editing.

If I had to decide I would say no to providing it on J2O/JCF, as the potential for abuse is too great. If it displayed alternate passwords for a known password (as Unknown Rabbit suggested) then I would have no objections, as it couldn't be used to break the password protection.

As an alternate idea, what about posting details of the algorithm used for passwording levels? I've no objections to that, as you'd already need some programming skill to turn that information into a password breaker (and would likely be able to work out the passwording yourself).