Hopefully this is positive news. This morning in my usual digg skimming before I start my day of work, I came across a post linking to MacScoop about the latest 10.5.2 developer seed issues fixed list. There was a couple things that stood out that where identified. First was network sharing of optical drives. That’s a given considering the MacBook Air’s quickly approaching release. The other discovered feature is the ability to use network volumes as a Time Machine backup device. By no means is this confirmed in the final build, Apple has pulled undocumented features last minute before on OS updates, but I’m keeping my fingers crossed.
If that feature makes it into final release, but you can’t use the afp share on the AirDisk, you can mount it as a regular Samba share and go about backups that way.
full list at MacScoop.com