I wasn't planning on going, but it actually looks quite good. The petzl site shows that they're going to equip a new sector in the Gorges de la Jonte - about 2km from the village of Le Rozier, which is about 25mins drive from Millau.
The naturalgames.fr website has some more details. Although I wouldn't recommend looking at the English version as it contains the most eye-wateringly bad translation I've ever seen.
Looks like the pros have a single "Infinity Lane" route to try - something like 120m to 140m long, with two belayers and at least 8c.
The amateur contest is 60 new single-pitch routes, each entrant gets a topo and off they go. There's also two multipitch routes to do (if you want to get some sort of CAF certificate?) and a easier version of the pros route: a 120m single pitch F6a pitch.