Brian at Riotous Labs has some great software called GrowlerID detects incoming calls to your Obihai device. Once an incoming call is detected, GrowlerID retrieves the caller name from white page listings or your Google Contacts. Once the caller name is found, GrowlerID then retrieves a photo of the caller from your Google Contacts or Facebook account. After the caller information has been determined, GrowlerID can show the information or send it over your home network so that any computer and most devices in your home are notified of the incoming caller.
http://riotouslabs.com/Support/topic6-growlerid-beta-stopped-working.aspx