SharePoint Document Library and physical folders

Scenario:
This is 5am and my friend asked me "Is it possible to create directory in share point where user can upload some document new files and they get synced with some physical folder for further processing by other LOB systems."

Solution:
Even though there can be many solutions to thsi kind of situation. I am listing a few here.

1. I will recommend not to create a physical folder and adjust the foreign process to read directly from SP Document Library ( 20 lines of code ). In case this is not possible for any reason, try other options

2. Create a new Visual Webpart/User Control to provide a UI for uploading a document and directly to the physical folder. This is kind of pure ASP.Net approach. Disadvantage of this approach will be that there is no copy retained in SharePoint.

3. Incase you want to retain a copy in Sharepoint also

3a. Modify the above Webpart/User Control to create copies in physical folder and sharepoint document library

3b. Provide a document library for user to upload documents and Create a Window Service with Timer to poll this document library for any changes and sync physical folder accordingly.

4. We can write event handler/workflow on the designated document library . Thanks to Gaurav suggesting this. ( It was 5 am and I was sleepy :) )

Any other thoughts ? Welcome :)