Those of you who read of Debbie and Karen's attempt on this event last year, and were spurred on by it to enter this year's event, please note that registration opens on January 8th at 8am (Paris time). Apparently it is likely to fill up early. All the information you need is on their website
For those of you less familiar there is a story here
You may or may not be pleased to know that the 2007 event will be longer(!) than before, at 165Km long with 9000 metres of climb.