Well, the topic is quite outdated. I did end up creating a way to list spell crit chance and posted it here:
http://www.wowroster.net/Forums/viewtopic/t=1088.html
However, none of that information applies any longer. The roster version is different now. And the spell crit I was listing was an estimate, based on the information we had concerning spell crit back then.
But now Blizzard does reveal spell crit, and an estimation is no longer required. I'm not on a system right now where I can just look at CP.lua to see if it grabs this stat, but if it does, it should be pretty easy to add spell crit in the new roster.
I'll try to get to it when I have a spot. Maybe someone will beat me to it.