I will note something - I have a scansnap scanner for windows (S510) - The Mac version software doesn't support the windows scanners off the bat. There are a few "cheats" out there -
1) The japanese version of the scansnap manager does support the windows version of the scan snap scanners, but doesn't have the english language for the application. One site has you getting both the Scan snap mac drivers and the japanese app. Install the mac version, copy the english.proj out of the scan snap bundle in applications, uninstall the mac version, install the japanese version, add in the english language files and go to town - I have the site bookmarked at home that describes the procedure in detail, unfortunately I can't remember what search terms I used to find it originally.
2) There is a thread on macworld that talks about getting the windows scanners to work on osx - the last page has links to their "patches" that would make the software work under Lion.