Why bother with fcal at all then? the only reason to even know that FCOE exists is if you're trying to bridge your old FC stuff into the 21st century. if you're building a new cluster and you're using ethernet, avoid FC alltogether and use iscsi.
Isn't FC(oE) faster than iSCSI over 10GE? Also would have the advantage of of not requiring an "extra" software layer? This is will new to me and I'm just theorizing right now. I'm waiting for the hardware to be delivered.