Does anyone know what the line 2 functionality will be like with the N900???

At present, I have 2 lines on my SIM, work and personal
I have full functionality with my primary line (work)
If I switch to my secondary line I can make or receive calls, but texts, MMS and data are all routed through my primary line. If I send a text from my personal number, it appears at the other end as if from my work number. As I understand it, this is a limitation of my phone which doesn't support full line 2 functionality. Is the n900 any different. Im trying to work out whether to port my personal number to another network, or keep both numbers on the same SIM as the n900 will give me a proper line 2...