I just got my Treo 680 working with my MacBook Pro. Trying to hotsync for the first time was a real trial with transport and device in use error messages. Thanks to this forum, I installed using root user and it finally worked. But now I'm having trouble understanding the relationship between isync and hotsync. Is my isync setup a one-time thing? I see that it replaced the Calendar and Contact sync events so that I now sync with iCal and Contacts. So, can I now forget about isync? Will launching hotsync now update my Treo's calendar and contacts with my iCal and Apple Contact list? Or, do I use the isync button to initiate the hotsync? And is there any way to initiate the hotsync with my Mac?