We will be presenting a full-day tutorial on WSGI at the Plone Symposium East at Penn State on May 26th. You can register via PayPal at the bottom of the page: hope to see you there!

http://agendaless.com/training/pse_2010/

I have uploaded Sphinxified documentation for repoze.urispace, a library package which implements most of the W3C URISpace spec for use in WSGI middleware. I'm planning to use it to select themes and rulesets for Deliverance based on the URI; other uses might include setting caching headers, or doing some flavor of "declarative security" in middleware.

http://static.repoze.org/urispacedocs/