UK Roaming Orange and T-Mobile

UK Roaming Orange and T-Mobile
I got a text message today (08/10/10) from Orange informing me "Now you can pick up a signal from both the Orange and T-Mobile networks....."Further information about this is available at the weblink below:

https://kareena.orange.co.uk/share/

Call and text in even more places
Now you can pick up a signal from both the Orange and T-Mobile networks in the