Specifically, the following clauses:
"All content on the Site and available through the Service, including designs, text, graphics, pictures, video, information, applications, software, music, sound and other files, and their selection and arrangement (the "Site Content"), are the proprietary property of the Company, its users or its licensors with all rights reserved. No Site Content may be modified, copied, distributed, framed, reproduced, republished, downloaded, scraped, displayed, posted, transmitted, or sold in any form or by any means, in whole or in part, without the Company's prior written permission, except that the foregoing does not apply to your own User Content (as defined below) that you legally post on the Site."
"In addition, you agree not to use the Service or the Site to: ... use automated scripts to collect information from or otherwise interact with the Service or the Site"
Since Facebook offers no controlled mechanism for accessing phone numbers I think it's a safe bet that they don't want users exporting their friends phone numbers, no matter what.
YMMV, I guess, since Facebook is notoriously inconsistent in enforcing their terms of service.