The Lifeblog Posting Protocol spec is available for download from Nokia:

"This is the technical document that explains how we use Atom to post multimedia content online. Use this document to figure out how to adapt your servers to use Lifeblog 1.5."

Atom support for the excellent MarsEdit is on the way, according to Brent:

"MarsEdit doesn’t yet support titles for Blogger."

"It will—but it requires implementing the Atom weblog editing API first. This is MarsEdit’s top priority."

Our friends over at BuzzNet recently launched their Developer Network. Along with the usual stuff (docs, feed list), they've also got a nice Community Wishlist of apps & tools for folks to hack on. We're assembling a similar list for Blogger's API — stay tuned for details.