++ for the "Wishing Well" idea, sauoq
however, I have a problem with the "as long as we can make it completely clear that their donation is just a donation"... in my experience, and I gues that in pretty much everybody else's experience too, this is very hard to do. As has been said here, if the person is too lazy to do the job, probably they will be too lazy to read the conditions/disclaimer/other. And even if the community covers its behind with a disclaimer, some unhappy "customer" yelling all over the place how he got ripped off when he donated x amount of money and got nothing useful in return will be unpleasant for everybody.
And then, there is the thing with the fact that the Monastery is not jobs.perl.org.
just some thoughts on the matter,