Scanner Copier scans multiple pages in Windows and prints them as a single document. This can be used in conjunction with PDFCreator in order to make PDF files from scanned documents similar to other 'scan to PDF' software.
A good system for scanning a large number of sheets! More and free (which is very surprising)
It's a bit large, but it gets the job done. Not extra features, but for scanning and copying (or printing to PDFCreator) it's the only GPL windows solution I've found that's easy to use.