I’m interested but I too am a fixie (with front brake), its the only bike I commute on. I think the safety of the ride is determined more by the rider than the bike and I think a SS/fix ride could work. Maybe we could even split the SS/fixie bunch not into SS and fixie, but maybe into ‘old steel’ and ‘new stuff’?

Not sure I could get up Mosman hill with the gearing I got though!