Can you import "Address Book" from MAC OS X to Droid Eris "People"?
If you can't sync you can always import by exporting your address book to a spreadsheet.
Here's a link to help get them into gmail.
Importing contacts by CSV - Gmail Help
If you apply a rom or theme - backup first!
If you don't know how to backup...Stop until you do.
hint: I name my backups like this: sg6.0_20100428 or ss4.2_20100626 to easily find them later. rom and date.
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