Microsoft is slowly getting Portico on more and more devices. The new OTA update system in WP8 has been working flawlessly so far. Many of the phones here in the US have already been updated, so now they turn their attention to other countries.
UK carrier EE began rolling out the update for the Lumia 920 yesterday. Also joining the party is Italy, Germany, and Russia. The reports have been coming in for the Lumia 920 and 820. Unfortunately no HTC or Samsung news, though the international 8X was updated a while ago. For a detailed look at Portico read here.
Do you have Portico on your Windows Phone 8 device?