SocialText lowers pricing
When was the last time you saw this happen? SocialText lowers pricing by two thirds. Pretty impressive. This strikes me as a much more realistic pricing model that the previous $30/mo/user. As valuable as I think Wikis are to the organization, that seemed excessive given the competition. And I think $10/month/user will make it a much easier sell to those people for whom wikis are a new concept, and those who haven't actually seen one in action yet.
But I think it's pretty likely that SocialText will come up with a "Pro" version eventually. Remember what Uncle Joel taught us about pricing software products and the demand curve. [Just be sure to read all his caveats at the end before you go off and do something silly.]