I’ve commented before that SharePoint can only be used as a social tool if you actually allow it to be used that way, however that introduces some inherent problems. I think this is a nice example of working within those constraints – let users suggest their own FAQs.
The “I would like to” page is at the simple (but effective) end of the spectrum. Another alternative, accepting that SharePoint is broad and narrow, is to plug the gaps by installing a third party extension like Newsgator’s social sites. They recently pointed out a case study on PR agency Edelman.