Let's get a conversation going here about the relative costs and merits of server-based unified communications in the enterprise vs. hosted unified communications solutions. Both types of solutions involve capability of PC to PC voice communications within an enterprise, and often, beyond the enterprise as well. Let's look at the cost issue. As reader and vp-marketing for hosted unified communications solutions provider Rurik Bradbury wrote me yesterday, a cost breakdown of a 20-user setup of Microsoft Exchange and Microsoft Office Communications Server crunches down like this: 2 servers hardware $2400 E2007 Standard Server (incl 5 CALs) $1229 E2007 15 CALs $1050 ($70*15) Outlook 20 users $2000 Windows 2003 *2 $1400 Backup server hardware $800 Backup software (CA ARCserve) $1000Subtotal: $9879...