In reply to Skyfall:
Hi Jon,
From my recent visits I would say although there may be new routes, the route lengths have stayed similar. I climbed all multi-pitch stuff on 60m halves (which were more than enough, all abs seemed to be for 50m halves or 100m single (the guides choice). I single pitched on a 70m rope, but from memory the single pitch stuff wasn't that long.
There are a lot of good crags if you go down the valley including a good variety of rock types, I have this guide
http://www.montagne-librairie.com/Escalade-en-Brianconnais-Haut-Val-Durance... which is good, but there seems to be a new version
http://www.climb-europe.com/RockClimbingShop/Briancon-Climbs-Guidebook.html so perhaps try and get that one, I am sure one of the many local climbing shops will have a copy. If similar it was pretty good in giving an indication of rock/crag quality. Hope you have a good trip, if a little cooler, the bouldering around Ailefroide is also steep (and very good).