[Hakkin]

I don't know if it's still the case, but it used to be that pretty much any semi-major company had a support presence on Twitter. Often just tweeting anything with the name of the company in it would get you a response from a support rep in a few minutes. It was one of the best ways to get in direct contact with support for many companies. The API limitations probably severely hampered this avenue of support for most companies, I imagine.