Google made a change this week in its Terms of Service which will require any entity that uses Google contacts API to also offer reciprocity. Google/Gmail users will still be able to export their contacts and save them on their own computers and then use them however they choose. However, the availability of using the API is not an option for those sites that do not allow the export of contact information – like Facebook.
I imagine this will be a significant setback for the growth of Facebook as I know that a good chunk of new Facebook users utilize the Gmail API to locate and or invite friends to join Facebook.
