In reply to Rupey:
The lydstep area is excellent, and the Rockfax guide for that area is good, but more in the cc guide for the Lydstep area. loads more on the rest of the south Pembs limestone, Newton Head is good, get the cc range east book and search though...
Barrel zawn is ok, but there are loads more spots in North Pembs, awesome stuff out st St David's head (some pretty gnarly sea conditions and quite remote) some nice friendly stuff out right from Porth Clais, and Abercastle is excellent, get the cc north Pembs book for those places.