You should think about registering a trademark if possible. This means it's easy in the long run. If you have a trademark you can have various services reclaim

You should think about registering a trademark if possible. This means it's easy in the long run. If you have a trademark you can have various services reclaim them for you. That said, twitter, gmail, yahoo, some tech news sites, digg, reddit, etc are all probably worth doing. You might also consider adding a getsatisfaction.com account.