DewBob and Pet,
You are both right: We need more info. I've redirected my request to Marcos at fengoffice a few minutes ago, and I hope they'll make suggestions.
About the scope of what's needed, I'll try to clarify my needs:
* What to sync: contacts, events, and (ideally) tasks. I don't need email sync as the OpenGoo email client isn't usable for me and we stick with squirrelmail, which we already have. I also don't need document sync as I'm unaware of any proper solution for that.
* Which whom to sync: If you support SyncML then I believe you'll already be compatible with a bunch of sync partners (via third-party extensions) like Thunderbird, Outlook, Apple iCal, iPhone, Google Calendar, Windows Mobile, other phones... From what I've seen I believe SyncML is the way to go, with the apparently best-supported open source system being funambol. There is a commercial SyncML solution from Synthesis.ch which has been praised for its stablility on some other forum.
* How to sync: I'm not a firm believer in Push-sync, I just don't believe it will work under all circumstances. So I'd be happy to have sync on request and that's all I need. for now.
certainly there will be many problems arising out of the openGoo extra fields like the workspace, access rights, subscriptions, etc. - I think I could live with many little restrictions there (e.g. don't sync subscribers, comments, …) if it helps to keep the development simple.
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