Vonage launches mobile apps; Focuses on international calls

Vonage on Monday launched applications for the iPhone, BlackBerry and iPod touch.
According to the company (Techmeme, statement), users of the mobile app won't need a new number. In the fourth quarter Vonage said it will add its World plan available to its mobile app. Under that plan, you get unlimited international calls for a flat fee.
While the Vonage Mobile app is notable---some have pointed out that Vonage was approved while Apple takes its time to approve Google Voice---it has limited scope.
For instance, I'm a Vonage customer at home and Vonage Mobile would be more useful to me if I could get calls from my home office line and manage my account from my mobile device. International calls are a nice start, but Vonage Mobile could be more.