How can I synchronize separate Tomboy notebooks between different Linux computers?

"There is no supported way to sync only specific notebooks. It is a feature we hope to add in future versions of Tomboy.

For now, you would have to write your own solution. Writing a Tomboy add-in would probably make the most sense, or if you are only on Linux you could write a Python script that accessed Tomboy through it's dbus interface.

Using Unison or another straight file syncing tool would not work, because Tomboy keeps all note files in the same directory, regardless of what notebook they belong to."

"If you happen to use Ubuntu, then Ubuntu One (beta) can might do it. (Given @Sandy's answer @jor's comment: I guess it's quite likely it will synchronize all notebooks though.)

(Standard on 9.10; separate install on 9.04 and later. It might even install on non-Ubuntu, but given the minimum version of 9.04 I doubt that.)"