Samsung have just released a ROM Update to their Blackjack device.
The update is available here and before you get too excited - it's just an update to the existing Windows Mobile 5.0 OS not an upgrade to Windows Mobile 6.
According to their support page
"This update should enhance roaming capabilities, especially Internationally. In addition, there are cosmetic user interface changes (several icons have been changed) contained within the update"
Be careful though as this ROM update does completely format your device so you will need to make sure you have a good backup!