i friend of mine had his HD fail and somebody on this forum helped him recover his coins. not 100% sure who it was but i think it was the guy who makes those shiny BTC coins.
I remember ~sipa helping recover a badly corrupt database (wallet) one time. That may or may not be the incident you are describing. ~sipa is, or at one time was, probably the primary coder of Bitcoin. I've not tracked commits for a long time, but that was what it appeared to me to be the case when I did.