I remember a while back that someone (can't remember who) had ported some of the Hybrid theme page templates over to Thematic, which I thought was extremely cool. I'm a huge fan of custom page templates and love seeing what people do with them.
So, if Ian doesn't mind me linking to my site, I've created many new templates for my users:
http://themehybrid.com/archives/2009/11/hybrid-page-templates
I just wanted to extend an opportunity to the Thematic community to make ports of these templates for the Thematic theme. I think many of them are quite useful and could be easily ported over if anyone wants to give it a go.