The techcruch article points out that there is no option yet to buy a domain and do a one-click connect to Google Apps, but it does, in fact, connect to Google Apps (though the process has about 25 more steps than would be ideal):
I'd expect that the integrations with things like Google Apps will improve before it goes GA rather than open beta -- one of the key reasons to have this service has to be to support one-stop shopping for Google Apps and/or Google Cloud setups.
https://support.google.com/domains/answer/6069226?hl=en
I'd expect that the integrations with things like Google Apps will improve before it goes GA rather than open beta -- one of the key reasons to have this service has to be to support one-stop shopping for Google Apps and/or Google Cloud setups.