Today, I've played with totem and its plugins. I have seen that they can be done in python/gtk. After hacking an existing one, I've built 2 plugins (in a very short time, less than 30 minutes). The first one is for listening some popular french radios. The second is for watching some streams of canal+, the 'zapping'.

I think I will made them better in the near future because it's easy and fun to develop them. I had never liked totem before, but it's pretty cool to let users(developers) improve it with plugins.

UPDATE 2009/06/16 : Now, these plugins are discontinuited. You should find them in a better totem plugin, named flux