Ernie...
I couldn't agree more. I was a huge fan of season one and was very skeptical of season 2. It was all that season one was..... EXCEPT.....the slave girls were not as good. Other than that it was awesome. According to some of the "star" rags my wife gets, they made a prequel because Spartacus had cancer and did not have the stamina that was required to perform the part. They wanted to retain the same guy and "waited" for him.
She also said that it has been mentioned that they have began shooting the 3rd season, so hopefully he is ok. Again, consider the source from which this came.
On TV, at the end of the series they did make reference to Season 3.