I've been told that the best way to get Flow turned on on my own talkpage is to ask you! Can I get it enabled on my en.wp talkpage? Apparently I can't do it for myself, according to Special:EnableFlow.
Topic on User talk:DannyH (WMF)
It seems you've already figured this out, but for the record: we're currently gathering requests at Flow/Request Flow on a page.