Microsoft founder Bill Gates posed a question on LinkedIn and garnered 3,500 responses. Dunkin' Donuts has attracted more than 800,000 fans to its Facebook page (sign-up required). And Dell offers deals and customer support through its primary Twitter page, which has collected more than 1 million followers.
Many big corporations are looking to make a splash in social media, but credit card companies have been markedly slower to the party. MasterCard's official Facebook page, for example, has picked up only about 2,000 fans and has offered no new content since July 2008. The four American Express Twitter accounts have amassed fewer than 350 followers among them. (MORE)