Yes, but not inside nettalk, because I didn't see a way for a NTWS to write to a public folder. Here's what I did, and a couple of things I considered:
1.) My public folder sits in its own DMZ, outside the scope of the NTWS platform. So I didn't think there was a way to write directly to this folder from NTWS.
2.) I could have shared a NTWS folder and made it public. This is probably the easiest thing to do, depending on your circumstances. But again, I wasn't willing to give up security (or rather, I wanted to hedge my bet, and not risk data on the notion I knew everything I needed to know about sharing a public folder within the application platform.
3.) What I ended up doing was writing a helper app that runs as a service. In my case, it is a document management system. When I tagged a record to backup (or to go to dropbox rather), it spins through my docs and finds any tagged records, copies the file from the NTWS folder, and into the public folder.
The risk with my method is that it exposes the document by sitting on a public area, but you could either have the helper app zip it, or maybe use some other encryption to secure the file. Maybe the Capesoft Safereader app would be ideal for this.