Yes, I've already spun them up. Here's the yarn. It's just a bit uneven, but not because of the batts, I was practicing my long draw technique!
As far as spinning from the batts. On these I just took the batt and tore off lengthwise pieces and spun those pieces. There were lovely and drafted and spun quite easily. Since then I've made some more batts and this batch I'm pulling the batts into roving and spinning from there. A technique I read about in Deb Menz's book. This is working very well too. I like both techniques about the same.