If anyone is interested in hearing from the creator, Sean Griffin will be talking about Diesel at the next Bay Area Rust Meetup on February 18th [1], which will be live streamed and eventually archived on Air Mozilla [2]:

[1]: http://www.meetup.com/Rust-Bay-Area/events/219697075/

[2]: https://air.mozilla.org/bay-area-rust-meetup-february-2016/