This could be quite interesting, but I've a few questions:

• Are we talking object databases or object repositories?
• How's the database queried? Does it support XPath-like queries? Something SQL-ish?
• Why does the database depend on Apache+mod_perl? It seems to me they could (should?) be independent
• Same question as above with respect to Psh, it seems it would be cleaner to expose just the database API.

Just my 2 cents, -gjb-