In reply to Richardlake:
I know a bit about it, I've lived there. PM me and I'll send you my phone number.
I'll be climbing there myself in September.
A bit separately, the heat wave is terrible, if you're going high at all (or even committing sport climbs lower down) be very wary of the conditions, there are huge thunderstorms and it's very unpredictable.
Search the threads, there's a link to the new sport climbing guide in Aosta.