Exporting your contacts to a format that most other email programs and services can understand is pretty easy. Export Your Outlook Contacts to a CSV or Excel File:
In Outlook , select File —> Import and Export
Highlight Export to a file —> Click Next
Choose your file format (Excel or CSV) —> Click Next
Highlight the Contacts folder. —> Click Next
Browse to specify a location and file name for the exported contacts.
Click Next —> click Finish.
I have used this with older Outlook versions, but this should be pretty safe still for 2007 .