+1's currently have no impact on rankings at all, personalized or otherwise (the only thing you will get is a 'so and so +1'd this', etc., but not an increase in ranking). I don't know if Google grabs FB Like data from public FB pages and uses that for anything, but I am thinking not (and they certainly don't have the private Like data to do anything with, but Bing does and may use it for rankings).
But really, what's the point of all this +1 stuff if Google doesn't plan on using it in the algo in the future? One has to assume they will factor it in the default rankings at some point, lowering the impact of links which are weighted way too heavily at the present time IMO. So if I were you I would be pushing hard to get as many likes and +1's as you can, assuming some day in the very near future Google will use that data to help them rank pages.