@Raptor464 let me know that China Mobile Hong Kong has released OS 5.0.0.608 for the BlackBerry Curve 8910, a device that (to my knowledge) isn’t available to the public yet. The Curve 8910 is rumored to look like the Curve 8900 with a trackpad and other minor differences. For more about this device check out the 8910 Archives.

Software For BlackBerry® Curve (TM) 8910 smartphone
BlackBerry Handheld Software v5.0.0.1023 (EastAsia)

Package Version: 5.0.0.1023
Consisting of:

• Applications: 5.0.0.608
• Software Platform: 5.2.0.43
• File name: 8910EastAsia_PBr5.0.0_rel1023_PL5.2.0.43_A5.0.0.608_China_Mobile_Hong_Kong_Co._Ltd.exe
• File size: 125.81MB

Note: The Software Platform and Applications version numbers can be found under Options-About screen on the handheld.

• Download: OS 5.0.0.608 for the BlackBerry Curve 8910 from China Mobile Hong Kong
• How To:
  • Backup And Restore Your BlackBerry
  • Upgrade your BlackBerry Operating System (OS)

Please report any feedback/findings in the comments.

REMEMBER: It is recommended that you make a backup before attempting to upgrade your BlackBerry just in case something goes wrong during the upgrade process. *