Hi all

Just found another solution to get iPhone sync:
The iPhone application todo+cal+sync brings its own calendar with SyncML support. Using GMS its now possible to sync an iPhone over SyncML. Lukas Zeller from Synthesis introduced a special "legacy mode" in version 1.7. With this option enabled, the sync with (the not realy standard compliant) GMS works perfectly...

todo+cal+sync only costs 17 swiss francs (about 15 US$), that's all you need!