Will LinkedIn and Twitter kill telemarketing?

Will Hawkins asks, "Will LinkedIn and Twitter kill telemarketing?". An interesting thought, based off a recent business experience where using Twitter and LinkedIn proved much more successful than hiring a whole telemarketing company.

I can't be bothered with Twitter too much - manly because I don't have a portable medium for Twittering, and I'm never doing anything Twit-worthy, but I do use LinkedIn.