i've had the same problem on and off, wasn't getting a signal on some channels but getting others. i just switched the box off at the mains, checked the cables and it seems to be fine now
I don't think its affected every o2 user, yesterday I couldn't call o2 mobiles but could call other networks and landlines, this morning though couldn't call any phone at all
Not True im afraid, the apparent fitness coach is a member of the gmkonline site, someone on there is just messing about and posting stuff on the football rumours site