Hi GBPCG Have a look at the descriptions of Sardinia's 5 main climbing areas (Iglesiente which includes Domusnovas, Cala Gonone, Ogliastra where we live, Isili and the NW of the island)
http://www.climb-europe.com/sardinia.htm for general background.
Domusnovas has some really good climbs, some polished ones (e.g. lower section Ruota del Tempo) and lots of new climbs. Also cimbs for most seasons though low down can be hot in summer (don't know when you are going) and the guys from Cagliari come up to where we live (see link above suggested by Angie) to climb in summer. The map guide for the Iglesiente area (at €8 is still worth buying for the map) pre-dates the 2002 Pietra di Luna which you should get in any case, and then you can get (free) some of the newer topos from
http://www.pietradiluna.com/blog/images/topos/topos_arch.html or (having read
http://www.ukclimbing.com/forums/t.php?t=345228&v=1#x5069568) by going to the Tropica Oasi bar in Domusnovas where you can find back issues of UP. There are some excellent routes on the sea cliffs at Masua if you want something more "challenging". A great place to stay in this area is Betty's in Villamassargia
http://www.gioiosaguardia.it/ we always go there when we are there. Obviously for this area fly to Cagliari!
The NW of the island is also good - I have climbed there only really at Roccadoria where there's an annual meeting, see topo at
http://www.roccadoria.org/topocard.jpg - and there is a new map guide
http://www.fabulaeditore.it/php/guide_2.php which you should buy rather than the alternative book (it's more recent); there are also lots of new sectors if this isn't enough. A good place to stay near Roccadoria is the agriturismo Mendulas
http://www.mendulas.it/ though you could stay in Alghero as well.
When are you going? What type of routes and grades do you want to do? I could even make some suggestions for easy ticks -
ciao Peter & email for more info to
[email protected] We also have the NW Sardinia guide for sale if you have difficulty getting it