It sounds like the MVS is only for business users and will not be of much use for individuals.
BlackBerry MVS 5 works with Cisco Unified Communications Manager to allow users to use a single work number between their landline desk phone and BlackBerry smartphone over a Wi-Fi connection. Some key features of BlackBerry MVS 5 include incoming call filtering, network preference settings (the option to switch between Wi-Fi or cellular for making calls), and Wi-Fi network access controls. BlackBerry MVS 5 will be available later this year from RIM's carrier partners. Pricing will vary depending on the retailer.