I'd rather see such a frame decked out in a Super Record derailleurs, but that's just me. I don't have a problem with fixie conversions, but it can be a bit annoying to see hipsters riding carelessly around on beautiful classic Italian frames when you know some of them don't really know what they've got. Then again I'm sure some of them do.
I raced for a few years in the 1980s (still have my 1988 Pinarello with Campy Super and C-Record), and some of my teammates converted their bikes to fixed gear for Winter and early Spring training. My main problems with fixies are that I live in a very hilly place where gears are very useful, and that fixies are just so trendy. Don't get me wrong - I do like seeing a beautiful frame whether it is running fixed gear or not, but I will really stop to admire a vintage frame with vintage components (including derailleurs).