Details of the update have been kept hush-hush (which makes writing this article that wee bit harder). But it is expected that it will include a dedicated Facebook link. It is also thought that the upgrade will allow series link recording so that entire series can be recorded.
Those expecting the dongle to receive Freeview HD channels will be sadly disappointed as the hardware can only receive DVB-T signals and not the DVB-T2 ones that HD uses.
Link: PlayStation Blog