You can 'only' obtain a product key "legitimately" from microsoft. If anyone supplies you with a product key through this forum they will probably get into trouble with microsoft.
Go here: http://www.microsoft.com/windowsvista/
And click on "try windows vista" to get a new and unique product key from microsoft.
noone is going to give you a product key especially with that attitude. you need to do as previously directed and go to the vista homepage and obtain your own product key. one product key will work for all the different versions of vista, the key isn't specific to rc1 or any other build.
<crying!!!!!!!!!!!!!!> I wanna have the product key!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1