For those that use ABBYY FineReader (OCR software that ships with Fujitsu ScanSnap), it's been updated for Snow Leopard.
Hello ScanSnap Snow Leopard subscriber,
The FineReader for ScanSnap compatibility update for Snow Leopard with ScanSnap S1500M and S510M is now available. For those that have already updated ScanSnap Manager for Snow Leopard, proceed directly to Step 7; otherwise, follow all the instructions on how to update ScanSnap Manager and FineReader for ScanSnap in the URL below:
http://www.fujitsu.com/us/services/computing/peripherals/scanners/support/sl_download.html
Best regards,
Fujitsu Imaging Group
ScanSnap Sales]