There's historically been a separation between businesses that sell directly to end customers ("business to consumer," or B2C) like Best Buy or Wal*Mart, and businesses that sell primarily to other businesses ("business to business," or B2B) like IBM or a large automotive component supplier.
The question: with social media, where people deal with other people and not an abstract "organization," does this change? (Chris Brogan has some thoughts here.)
What do you think? Are B2B and B2C outmoded terms as we all start to interact as "people?"