Thought this was worth pointing out since the Durus guys don't seem to make PR much of a priority. (No slur intended. You could say the same thing about Spyce. :)
Here's the 3.0 changelog. IMO the coolest parts are zlib compression and incremental packing.
Spyce has a Durus interface (spyDurus) that makes persistence even simpler than the various ORM tools. The to-do demo uses Durus.