New shopping APIs

Hi, on the project page is indicated the following step:

Go to http://code.google.com/apis/base/signup.html and get an api key for your domain

but it seems that those APIs are deprecated --> see http://googlemerchantblog.blogspot.com/2010/12/new-shopping-apis-and-dep...

Have I to get the API key from another place, or can still use that ?
Thanks In Advance.