In reply to BoulderyDave: I was there in january 2009 and my guidebook that I bought at that time shows many 20 - 30m abs off the back of the pinnacles. I cannot comment at all if anything has changed, you may have far more up to date information. However I did find fellow climbers very friendly. We fancied a crack route and the folk camping next door to us lent us 6 cams of the correct size after about 30 minutes of discussion. Absolutely loved the place! After 5 weeks of travelling all over Argentina, this was the one place I wish we had spent longer at. Hope this is helpful.
I think the ability to do 40m raps should suffice on most of the routes... ask around in the campsite/refugio as the popular routes are climbed daily. I can't remember there being any really long raps (unless we joined them together), but seeing as we had a 50m half/60m single combo I wouldn't have noticed too much!
Fantastic area. Print out tops ahead of time from pataclimb.com or buy the guide in town/in the refugio - I'd definitely recommend printing out the photo topos too though as some of the line drawings are super confusing. Photos aren't in the guidebook.
Fantastic area, would go back in a heartbeat. Let me know if you want route recommendations (on the easier end of things)