The premium package incudes dozens of TV channels and access to hundreds of on-demand moves, dramas, children's programming etc. The on-demand offering is excellent and included in the "premium" package. Dramas are indexed and the player can pause and rewind. It will also remember where you left off.
Outside of the US it is available in Paris, Tokyo and Taiwan.
Zattoo offers access to dozens of European channels. The service will become available in the US in 2009. This is sort of lame - the company was founded in the US in 2005. I hope they won't do something as silly as only offer US channels. Unfortunately this is a very strong possibility because of copyright issues etc.
Shift TV - German
I will update this post with all IPTV oferings I am able to find. I would welcome any contributions.