PROBLEM STATEMENT
My client work involves a distributed network of consultants that
feed into a common sharepoint document repository. The sharepoint
repository is off site.

Due to restricted network security, many of the consultants do not
have access to the sharepoint site during the day.

I was looking for a solution where these consultants could email
their documents as attachments to the sharepoint repository; (much
like sending a picture to your album in Flickr).

SOLUTION SPACE:
1. What are my options to accomplish this in Sharepoint 2003 and
2007?
Any tips, pointers and guidance is greatly appreciated.