"We're going all out. The whole entire map. Yes, we intend to visit every single Tube station on the map, from zone 1 to zone D, from Acton Central to Willesden Green, all 274 open Tube stations in one single day.
It's going to be hard. We're starting at just after 5, when the first train departs from deepest darkest Middlesex towards Central London. We'll see the sun rise, and then set again, in the course of our challenge (assuming we're not underground that is). We'll probably finish around 20 hours after we started, having run the equivalent of 10km each, travelled many miles across London and used transport as diverse as Tubes, buses, trains, trams and light railways.
We want to raise as much money as possible, and get press coverage for the whole Tube challenge group as well.
Now, you may be asking yourselves "well, how can I help? I'm not running all that, I'm not that insane, but I want to contribute." Well, the obvious answer is to sponsor us at http://www.justgiving.com/cintubechallenge07 - it's what most people will be doing, and certainly the easiest way to do it. You can sponsor us on completion, or for the number of commuters we knock out of the way, or the number of trains we just miss the connection for."
To see how they get on, check out their blog which James will be updating by text along the way.