BlackBerry Internet Service (BIS) is the email service on RIM Smartphone  provided by the respective carrier; T-Mobile, AT&T, Verizon, Spint, etc. BIS just got updated to version 3.0 on RIM’s North American BIS servers.

The main attraction is the 2-way Gmail sync has been enabled as reported by a BGR tipster. Below is the features of BIS 3.0 [Source RIM]

BlackBerry Internet Service 3.0 is the latest version of the BlackBerry Internet Service offered by Research In Motion.

• Enhancements to Google Mail integrations
  • Google Mail Account to BlackBerry smartphone synchronization of read, unread and sent email message status for new Google Mail integrations
    • Note: this feature will be added throughout the Spring 2010 by region
• Enhancements to the Google Mail Plug-in
  • Create and delete labels from the BlackBerry smartphone
    • Note: The Google Mail Plug-in requires BlackBerry® Device Software 4.5 or later and a Google Mail integration, using Internet Message Access Protocol (IMAP), within BlackBerry Internet Service.
• Additional Language Support for Basque, Catalan, Galician, Romanian
• Increased Attachment Compatibility
  • OpenDocument Presentations (.odp)
  • OpenDocument Spreadsheets (.ods)
  • OpenDocument Text (.odt)
  • OpenDocument Text Templates (.ott)
  • Windows Media Audio (.wma)
• Extensible Hypertext Markup Language (xHTML) Support for non Thick Clients
  BlackBerry Internet Service 3.0 is designed to support xHTML for non Thick Clients, providing BlackBerry smartphone users with a richer user experience, allowing for buttons, additional fonts, and colour controls when subscribers access and toggle their user settings.

• Device Switch Revalidation
  Changes to optimize the email setup and deactivation experience when the subscriber switches BlackBerry smartphones or Subscriber Identity Module (SIM) cards.