You're right about the name. Ysgol does mean school. I've emailed Alex and told him to change it.
The Porth Oer cave is an excellent venue, with some of the best looking hard (V10?) projects I've ever seen and a perfect sandy landing. You do need a good breeze - a bit like the scene at Angel Bay.
I went down on Sunday with Mark Katz, and the cave was bone dry. We sat on the beach brewing up for half an hour, then it pissed it down!
Of course I will be back - perhaps not for the really hard stuff, but the main roof crack is a real battle.
I do believe there are more venues on the north coast - we just haven't found them yet. I did do a sea level traverse from here for about a mile north with Mark Lynden a few weeks ago. No bouldering, but some wacky new routes to do.