In reply to Rog Wilko:
Interesting little thread.
Funnily enough I was there in May. It's a lovely island, well worth a visit, but I only had a quick look at the cliffs due to time constraints regarding the ferry. The crags I looked at were very modest in size; more of a mini mini mini Kilt Rock, but reasonably extensive despite not being very high. Definitely climbable though IMHO - and if I didn't live so far away, I'd be going back.
http://www.bbc.co.uk/scotland/islandblogging/blogs/000017/0000013240.shtml
I did some very brief research and there's some coverage in the SMC's 2014 Inner Hebrides & Arran guide.
This is on Ulva's Nose Bleeding Wall:
https://i.pinimg.com/736x/88/ea/3f/88ea3fd6008513eff4ed0b65d0be84de--isle-o...
and this is somewhere else on Ulva:
https://scontent-lga3-1.cdninstagram.com/t51.2885-15/e35/20759122_186806025...
Colin Moody, who I believe lives on Mull and is co-author of the SMC guide, would be the best point of contact though:
Colin Moody
HTH
Dave