That's my interpretation as well but it's not what I'm seeing. 0.4 still seems to use the same access numbers for all outbound calls.From my interpretation of the blog post, previously your phone would send the number you wanted to call to the Google Voice call server, your phone would call the access number, the server identified your phone, and connected you with the recipient via GV point-to-point land-line tunnel. Now, GV does the initial unique number assignment & pulldown, remembers it, and dials that as the access number every time you call with GV, resulting in suqsequently shorter connection times and no need for a data connection.