The TextBridge manual we distribute with the Apple Color OneScanner 600/27 and 1200/30 answers your question.
The TextBridge application will support a variety of scanners, those that are TWAIN compatible, those listed both in the TextBridge manual on pages 1-5 and 2-8, and those on their web page. The two scanner drivers bundled with the Color OneScanners provide support for the Apple Color OneScanner 600/27 and 1200/30.
TextBridge information may be obtained at:
http://www.scansoft.com/