I had sucess syncing opie with sunbird using multisync:http://img78.imageshack.us/img78/1732/screen0702069la.jpg
First of all if get the branch version of multisync from here:http://packman.rsync.zmi.at/debian/sid/multisync-cvs/
There is the source in the tarball, if you dont have Debian Sid. I compiled it on Debian Sarge, but had a problem with evolution plugin, so took it out from my build rule. By the way then the multisync didnt worked fine. So I just took the compiled sunbird plugin and used it with the multisync0.82 included in sarge.
But you have to attend to two additional things. The plugin uses local ics files from sunbird. Newer sunbird versions store them in a database, so that is bad. In this case I downloaded the recent Calendar extension for thunderbird (is a little sunbird) which stores the calendar in ics.
The other thing which is related to that, you have to configure the plugin by environment Variables:http://www.mail-archive.com/multisync-user...t/msg02186.html
For me, as an example, I have to this in the shell, from which I start multisync, before I start it:
So you have to locate, where you ics files are.
By the way I am really lucky about that, because I can sync sunbird with webdav calendar at work
PS: For Zautix: This could be also a nice way for Kopi, I remember you use ics too.