the LT version is a free download, the full version is a one month trial, we have decided to equip all engineers and minor CAD staff with ProgeCAD, and give only the CAD power users AutoCAD.
I like progecad, it has the same menus as AutoCAD, can function with 2006 drawings, has inbuilt support for DWFs and also comes with it's own PDF printer.
There are a few things it can't do, but they are very few and there is normally more ways to skin a cat. I would recommend this package, get the LT version and have a muck around with it.