I wrote a page that explains the Camel stuff that I have been blogging and mailing (like a crazy horse) about.
ps. Performance people: if you are technically interested, I can definitely use your help. There’s still a lot to do. We can reduce the memory usage even more (mainly for online usage of Evolution). It will also help tinymail with doing its initial load of a large folder. More info about this in the article and by simply asking me.