This is the kind of thing I fund immensely helpful, and hope that it expands past costing into the other aspects for volunteering as well - I asked some time ago what sort of things would be good for someone with only a little time to contribute, and while there were a few suggestions here and there, the question seemed mostly confusing at the time. Having baby-bait out for everyone would make it much easier for people to contribute, even in busy lives, and feel accomplished that they did something meaningful. And the list of Things Real Developers Do is both encouraging and hilarious.
Re: Mentoring - as mentor