It's about time. Nextel botched this.
When I first got a Nextel from work many years back, I was excited that it was "two-line capable", and eagerly called customer service to see about putting a personal account on the same phone, so I could keep work and personal calls separate, and have my own data plan.
No can do, they said. The two lines have to be on the same account.
What the hell would the point of that be? Lame. It's nice to see someone finally, finally tackling the bat-belt syndrome.