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Telephony startup Jangl is set to announce Phonebook for Facebook, which puts calling and voicemail right in your profile and inbox on Facebook. With mobile use booming among that demographic, we suspect it could be a very viral service. The feature list:
1. Get a local phone number to call any other Facebook member who has the Jangl Phonebook application
2. Manage those phone numbers and relationships on your Facebook Contacts page
3. Receive and organize your Jangl voicemail messages in their Facebook Inbox
4. Promote your availability with simple links on their Facebook profile
5. Easily invite new people to install Jangl Phonebook