Our main focus is to create and maintain eCommerce sites with Interchange.
On one hand it runs smoothly on existing sites and supports customization needed by our user base.
On the other hand it predates developments like PSGI, plugins and abstract engines for sessions, logging and templates.
For the future we decided to do a complete rewrite of the Interchange software. I will talk at YAPC::Europe 2011 in Riga about our plans.