The high end of enterprise communications may be a death struggle among heavyweight incumbents and the established software players trying to muscle in, but at the SMB end, there's all kinds of new and different companies making their pitch, from integrations with Google Apps to this new company, Unison, which pitches its solution as a complete UC solution in a single server: PBX, email, IM, calendar, contacts, directory/presence, even antivirus/antispam (for the text communications, not voice). I got more details in a conversation with Rurik Bradbury, Chief Marketing Officer at Unison.