There were only test/alpha maps. They didnt make the finally cut, though if rnough people keep dying to see them, expect the mod community to cook somthing up
I agree with WhiteZero. The versions of the maps from the e3 (which was also the stolen build) and the final version of HL2 are just one digit, so I have no idea what that means.
But people will soon find ways to port it over. I'd like to play these.