You're right, they have now added in a longer list of providers, and virgin media is now listed. That said, it still doesnt work. ;-(
Frustratingly, I have had to factory reset my cube simply just to be able to experiment with updating the cable/set top box options when my VM hdmi cable is plugged directly into the cube.
When you connect your HDMI cable directly to the Cube, it walks you through the task of setting up your setup box so it can be controlled from the cube. However, after it fails, it doesnt seem to allow you to walkthrough this same settop box set up process. Instead, you're forced to remove the hdmi cable from the cube and connect it to the TV. YOu're then able to go into Manage Equipment and try setting up live TV (which in turn asks if you're setting up cable or settop box). And still, no joy, but at least i'm not having to factory reset the box.
All in all, i've found it a pretty frustrating experience. I have wasted over an hour on something that should be v basic. I've also contacted amazon support and it was embarrassingly bad.
I don't think i would recommend the cube to anyone - its expensive, and doesnt do what its supposed to do out the box.