Depends on how narrowly they define their segment. I've done a ton of customer development interviews with people over the past 8 or 9 months, exploring this whole "enterprise 2.0" space, and I've found that - by and large - most people haven't even heard of Yammer (or Jive, or Broadvision, or Lotus Connections, etc). My perception is that anyone playing in this space isn't even really competing with Yammer (or Jive or whoever) they're competing to convert current non-users of this kind of technology.
Depends on how narrowly they define their segment. I've done a ton of customer development interviews with people over the past 8 or 9 months, exploring this whole "enterprise 2.0" space, and I've found that - by and large - most people haven't even heard of Yammer (or Jive, or Broadvision, or Lotus Connections, etc). My perception is that anyone playing in this space isn't even really competing with Yammer (or Jive or whoever) they're competing to convert current non-users of this kind of technology.