A long long time since my last Advogato visit... :-(
Anyway, for the last few weeks I've been working on my Yukatan webmail project, whose primary goal is to create a database-backed webmail system. So far I've been focusing on the database backend that runs primarily on PostgreSQL.
I've documented the development of the Yukatan data model at http://yukatan.sourceforge.net/sql/yukatan.html, and have now reached 1.0 status with the database backend.
I'm posting this etry to Advogato to get some comments and feedback on the database design. If you are interested, please take a look at the SQL schema and related documentation. Please send any comments by email or as responses to the SourceForge news entry.