Well, you're right about the LS2 being fazed out, but according to the following, there won't be a Z28, just the 1SS and 2SS:
2010 Chevrolet Camaro 1SS 2dr Coupe Trim Comparisons
2010 Chevrolet Camaro Options - 2010 Chevy Camaro Packages - Motor Trend Magazine
2010 Chevrolet Camaro Fuel Economy Figures and Option Packages Released - Car News/Corvette/Camaro Corner/High Performance/Hot Lists/Reviews/Car and Driver - Car And Driver
I'm not quite sure where I saw the LS2 info though. May have been something I
thought I saw. However, according to this:
http://krang.superchevy.com/features...ifications.pdf
There doesn't seem to be a Z28 package at all. It MAY happen, though with a big increase in HP (and hopefully better handling if GM gets their heads out of their @sses) as already mentioned.