I have only just come across your message from 2007. I am descended from Simon KILBY bapt 1748 in Flamstead, Herts. If you are descended from Joseph KILBY bapt 5 Jan 1794 in Flamstead, son of Daniel KILBY and Ann then we may be distantly related. My line is on the KILBY genealogy community website as are details of the KILBY DNA-Project, which has so far proved a relationship between myself and a KILBY in the US, whose family came from Wheathampstead, Herts.
I have also transcribed the KILBY records from the parish registers for Flamstead if you are interested.