Hi Zoke - 

I thought there was already a 'charity' as such which existed to collect funds for open source and community projects : LinuxFund.org

I don't know how / if we* would be able to use such an organisation, rather than reinventing the wheel (so to say), but even if we can't there is at least a template under which it could be established 

*by we I don't just mean HPR but all of the podcasts out there...