The Minimap sidebar contains experimental functionality to support comma seperated value files (CSV) ideal for opening in a spreadsheet application such as Excel, openoffice.org or Numbers. The exported files use ',' as the seperator and '"' as the item surround.
Exporting All address list items - If you would like to export all of your address list items to csv, open up the minimap sidebar, go to the ëtoolsí menu button on the toolbar and select ëExport All To -> CSV
Exporting a selection address list items - If you would like to export a selection of items from your address list, use ctrl+click (mac cmd+click) or shift+click to get your multiple selection, then right click and select ëShare Location -> Export as CSV
Importing - Not currently available.