Ubuntu Bug - "Sent from Ubuntu" for Evolution

While reading through my twitter feed, I got an interesting tweet which pointed to the following Ubuntu bug:

https://bugs.launchpad.net/ubuntu/+source/evolution/+bug/615300
Enable default Evolution signature as "Sent from Ubuntu"

Someone wanted to copy the "Sent from iPhone" idea for the Ubuntu machines. Just like any other online long discussion, most of the arguments I believe will be time-wasting to read ;-)

Evolution has Face header support for a long time now and I wonder if the next course of action will be to add the distro logo as the Face header for all mails sent from the distro. For Face header screenshots, Look here.

Bidirectional Synchronization of SQL based Databases

Any of you aware of any projects or research papers on bidirectional synchronization of SQL based databases, that will do an intelligent sync. ?

To explain it: Consider the sqlite database in your browser that stores you browsing history. Now is there a way to store this sqlite database in a server and intelligently synchronize new/deleted history items (instead of the full file) from different clients parallely (say mobile, two PCs etc.)

I know of projects like Mozilla Weave which does this. But What I am interested in is not in finding a solution for the above history-sync problem, but a generic technology for synchronizing SQL accessible databases.