OK, we just had an hour long IRC meeting about Listar, and a few ideas came up. I'm toying with the idea of starting a non-profit org to hold trademarks for open source software projects (doesn't matter what license, honestly)
The issue here is that certain smaller projects do not have the people/time/resources/money to do this themselves, and in the case of Listar in particular, we got bit by the trademark problem (a new "Ask Slashdot" will probably be posted about this). We personally don't want to get bitten again, but I'd like to have a larger scale non-profit to help other projects. If I'm going to do this, might as well make it community-wide.
Apache, FreeBSD, NetBSD, and even the FSF have foundations to do this, I assume the FSF requires the project to use the GPL, which some people are opposed to.
I'm personally interested in doing this out of need for us, but for other projects as well. So I'll look into it, I guess this has gone beyond the "toying with the idea" stage.