I recentlt took part in a trial for [vizzitme.com...] which is also a webcam / phone type service created by BT. It was actually really good but at the subscription prices they were talking i think it was more aimed at business users.
I think in their Terms & Conditions they say that they have the right to install any software on your computer at a later date. Most probably sucking everyone in and then sticking them with spyware in the future.
I think I saw this on the negative reviews page on download.com