Are you serious? Your contacts on your Treo are already on your Mac (Address Book) or PC (Outlook Contacts). You get your iPhone, and it syncs with the same list of people...
lol no the iphone only syncs BASIC fields, (very basic fields) on a Treo or any WM phone you can sync these fields since pocket outlook is way more powerful than the iphone.
Treo >> iPhone = Step down
(yeah i know its a little truncated but there is more than 120 fields)
Account Business Phone 2 E-mail2 Display As Home Address Street Mileage Phone 1 Selector Read
Address Selected Callback E-mail3 Display As Home Fax Mobile Phone Phone 2 Selected Received Representing Name
Address Selector Car Phone Email Address Type Home Phone Modified Phone 2 Selector Referred By
Anniversary Categories Email2 Address Type Home Phone 2 Nickname Phone 3 Selected Reminder
Assistant's Name Children Email3 Address Type Icon Office Location Phone 3 Selector Reminder Time
Assistant's Phone City File As IM Address Organizational ID Number Phone 4 Selected Reminder Topic
Attachment Company First Name In Folder Other Address Phone 4 Selector Sensitivity
Billing Information Company Main Phone Flag Status Initials Other Address City Phone 5 Selected Size
Birthday Computer Network Name Follow Up Flag Internet Free/Busy Address Other Address Country Phone 5 Selector Spouse
Business Address Contacts FTP Site ISDN Other Address PO Box Phone 6 Selected State
Business Address City Country/Region Full Name Job Title Other Address Postal Code Phone 6 Selector Street Address
Business Address Country Created Gender Journal Other Address State Phone 7 Selected Subject
Business Address PO Box Customer ID Government ID Number Language Other Address Street Phone 7 Selector Suffix
Business Address Postal Code Department Hobbies Last Name Other Fax Phone 8 Selected Telex
Business Address State E-mail Home Address Location Other Phone Phone 8 Selector Title
Business Address Street E-mail 2 Home Address City Mailing Address Outlook Internal Version PO Box TTY/TDD Phone
Business Fax E-mail 3 Home Address Country Mailing Address Indicator Outlook Version Primary Phone User Field 1
Business Home Page E-mail Display As Home Address PO Box Manager's Name Pager Private User Field 2
Business Phone E-mail Selected Home Address Postal Code Message Class Personal Home Page Profession User Field 3
E-mail Selector Home Address State Middle Name Phone 1 Selected Radio Phone User Field 4
Web Page
ZIP/Postal Code