Here is the link to the Samsung US download site. On this page are currently pointers to 2 drivers:
* Win XP/Vista - Device(Install),USB Driver (Software) (ver.5.02.0.2)
* Win XP/Vista/Windows 7 - SAMSUNG Kies,Others (Software) (ver.11011.4)
Samsung SGH-I897 software download page
These are not direct links to downloadable files. the hope is that you can revisit this page and find updated drivers et all whenever they become available.
I successfully installed each of these. One to a Windows XP Home machine, one to Windows 7. Enjoy.