In the Free Software movement the typical response to these kinds of demands is pretty simple, "There's the code, please do feel free to go fix it!"

Likewise in the hippy anarchist movements if you suggest something like a rally or a sit-in the usual answer is "Sounds good, when are you going to organise it?"

Which I tend to think is pretty much the right answer. If someone can't be bothered to do the things they suggest themselves then I can't really understand why they think they should be able to convince others to do it for them.

The key is to make the cost for getting in there and starting to do those things really low, making the source available to everyone with a simple download, making it simple to contact the whole group and start organizing.

Personally I've helped with and joined loads of different cults and projects, even started one, and found that the key to getting me to do stuff to help at least is to make it both simple to do and obvious how, to ensure that I realize I don't need permission to go do something.

You've said yourself that you were surprised how much of a barrier even having to send an email to OB was compared to having a big "submit your article here" button on Lesswrong,

I have vague plans to take a look at the source code for less-wrong and fix a couple of things that are annoying me, but it won't be till after the Subgenius show I'm organizing at least, when I have a bit more time.