The developer of syncevolution posted to the maemo-developer mailing list that he is searching for a maintainer of this project for maemo5:
http://lists.maemo.org/pipermail/mae...er/021630.html
Unfortunately there was no feedback. I'm not a developer but I used syncevolution for a long time on Maemo 4. It's a fantastic piece of software and it would be great if someone would take this challenge.

I always would be ready to test it once it will run on my N900. :-)

Please see also: http://talk.maemo.org/showthread.php?t=37034 and vote for this solution.

Ciao jukey