Journeyman had an excellent idea over on the C2C forum. If you'd like to read it, it can be found via this link:

...With reference to his thread, here's a similar thread for ODP walkers. Anyone walking the ODP this year who might wish to meet up with others who are walking at the same time, please post here.

As for us, we will be walking a ~75 mile section, south-to-north, in mid-May. We don't have our exact start date sorted out yet, but will post again when we do.