It really does depend on the person. For the original SCEA, I think it took me somewhere in the neighborhood of 100-120 hours - then again, I was also working around my full-time job and planning a wedding, so I can't be fully sure.
For SCEA for
Java EE 5, it took me about 60 hours, which I actually had full-time to do. (I'd taken leave from work to get it cranked out.)