I started with OSM in July 2006. I'm currently trying to clean up Islington and surrounding environs, and the East End.
I'm using a generic bluetooth GPS unit with a Sirf Star 3 chipset, and recording the tracks on my Nokia N80 phone (not recommended: nice screen, but slow and annoying user interface and annoying and stupid incompatabilities) with GETrack, until I can get a FOSS program working.
I'm using the ABC Street Atlas of 1933 a bit, mainly to remind me of street names .
Some differences with the present day that I've found:
Devonshire Steet - now Devonia Road (IIRC). Laycock's Yard - now Laycock Street. Church Street - now Northchurch Street. Park Street - now Islington Park Street. Richmond Road - Richmond Avenue?? Banbury St - Danbury St Noel St - Noel Road
Hit list (places need GPS tracks for)
Waterloo Terrace Canonbury Park South Laycock St Compton Terrace Barford St Streets off St Peter's St
Richmond Cresent / Ripplevale Grove area Middleton Square Remington St (off City Rd) Streets behind town hall Calabria Rd area