I have the same problem and the same question. Don´t works my new phone Nokia X2-00 with iSync. How add my agenda and numbers from my mac to my phone? Some idea... Thanks.
There is a plugin on the web to get iSync to work http://uploading.com/files/get/4556fb19/
and I managed to get my media files onto the phone, by simply dragging music from iTunes onto the micro SD card's playlist folder.
Both Plugins doesn't work with osx 10.6.6, isync 3.1.2 and the Nokia x2-00 v04.80 rm-618 on my macbook pro mid 2010 via bluetooth. Synchronising addresses fails after a while. The contacts which are copied to the phone are those with one number. But not all single-number-contacts are copied.
This is not a complete sync - but I was able to do what I wanted to do - transfer files (photos for now - I will also test mp3 files later)
This is what I did -
1. Enable BlueTooth on phone.
2. Enable Bluetooth on Mac.
3. From Bluetooth Menu => Nokia X2-00 => BrowseDevice. (Check screen-shot)
I WAS ABLE to transfer pics from my Nokia phone to Mac & vice versa.
Please note - I had an additional memory card and all photos and music were stored there.
I DID NOT UPDATE CONTACTS.
I also installed the iSync update utility mentioned on the forum but guess in my case it does not come into the picture.