If I wanted to be really cheeky I could suggest this as an example of American Socialism:

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness
Although in truth I'd say the founding fathers were more Liberals than they were Socialists.

I would definitely argue though that some organisations should exist first and foremost to provide a service, not to make a profit. The disastrous privatisation of the UK postal service is an example of this: The new managers seem to have decided that the most profitable way to run a postal service is not to deliver any post or have any post offices, and thus seem intent on closing down the company entirely.

Having a few key services run centrally to maximise their public service benefits the economy as a whole, even if they do not make a profit themselves. All countries have this to some degree, even the US, so I suppose you could call this American Socialism. It's simply a question of balance between a Socialist and Capitalist system; either extreme is unworkable.