UK based Oregan Networks extends Skype functionalities to your TV.

Oregan Networks is an embedded software maker for consumer electronics. The company enhanced their Oregan Media Browser suite now with Skype functionality.

The new feature enables you to receive Skype messages and calls whilst watching TV. Now we just need to wait until some hardware maker will release a setop box running this software and you can Skype away on your Telly. Oregan's core product has shipped over 3 million units. Their customers include Sony PlayStation, Philips, Oki and NTT.
More details on the Oregan site.