Quote from Thrillho
Where did you even get the ZIP file?
I would assume it has minecraft.jar inside the .zip file. Just copy it over to the bin folder.
Not sure what the heck is happening but this morning when I tried to download it with IE, it got the .zip (lots of class files and directories, but no jar files)for both the client and server.
I switched to Firefox, used the same links and the .jars downloaded just fine.