I got my PDA, it runs Windows Mobile 5.0, great isn’t it ? 
But how can I sync it with my laptop (MacOSX iCal, Address Book & co) ?
Exporting my calendars in vCal does not help much, PocketCalendar only took the first item… the same goes for PocketContacts… (f*ck !!!)
Of course, ActiveSync 4.1 does not work with VPC7. Those days, I feel really out of luck.
In the first times, I was looking forward funambol which appears to do what I want & got some support for the software I used sync-evolution or sync-mozilla (only calendar…), nevertheless there are no real Unix client nor something usuable on MacOSX.
Maybee, the Windows Mobile client is able to sync against an Open-Xchange ? It’s all about syncML after all…
This proposal is false since Funambol uses its own file format.
At the moment, I found Plaxo to be fairly usefull.
It got a Mobile client thanks to WebIS (not opensource anyway…) and an official MacOSX port.
The sync is done over https & your datas are stored using a 128bits scheme encryption, is this safe enough ?
Not for me, I do not like my datas to be stored on a server I do not owned; especially when it goes to private information.
Moreover, one caveat exists anyway since it can only sync my contacts but not my agenda. I hope this feature to be added soon.