I'm on the PostgreSQL home page: what series of links would lead to "uservoice.com" so that I can submit my feature request?
If that site is going to be recommended over posting to pgsql-general it should feature prominently on the main website.
I've seen or heard nothing that suggests anywhere except pgsql-general, this list, is the correct place to submit such requests. I do think we are lacking sufficient communication in this area but would rather see that corrected and formalized before we go pointing people to third-party sites.