Yes, nothing like just giving it a try!
In my case, at least, the intent is not to drink beers at 55; just store them non-refrigerated until space opens up in a fridge. It may take months for this to happen, as the times I have available to brew are not always optimal for when I want to drink that beer.
In the absence of any anecdotal evidence Eric, I'd venture a guess that it will be OK. Some of the main culprits in ageing beer are oxidation, autolysis, and contamination. So if the beer is lagered or conditioned before racking to keg (to settle out a lot of yeast), proper care is taken during racking to keg, and the keg is force carbonated, it would seem the results could be at least as good as my old bottled beers turned out. Dr. Bamforth has pointed out that oxidation potential decreases dramatically the colder you can keep the beer. All in all, a constant 55 is one helluva lot better than a shelf in a store.
I'll be doing it this summer in any case.....