Doesn't matter if there are, IBM / Lotus needs to do this so companies develop all those wonder little convenient integration points. For example, "Neat Receipts" has direct integration will all of Microsoft Office, including Outlook, but nothing for Lotus Notes.
I have seen Card Scan work with Notes, but that's about it.
The problem is Outlook only has the latest version of windows to support. I found most of my twain scanners don't work under Vista. How would Lotus be able to support Linux, Mac, XP and Vista? There is a twain driver for notes that is free.