Apple will announce its fourth quarter financial results later today. As it has done in the past, the company also plans to conduct a conference call to discuss its fourth quarter results; the call will begin at 2:00 p.m. PST and will be available as an audio webcast. Facebook’s official application for the iPhone and iPod touch will be gaining Push Notification support in an upcoming update. Joe Hewitt, lead developer of the app, has said on…