I've only just noticed that the BBC Press Office has an RSS feed for news about the BBC itself. It contains links to notices on appointments and other useful things.
The current items are rather confusing, because many of the 'appointments' are either (a) posts which have been re-named as part of Mark Thompson's re-shuffle; or (b) posts which replace existing posts. The proliferation of titles - Controller, Heads, Directors - makes the appointments difficult to understand without an organigram.
Of the nine appointments, only one - Peter Salmon, Chief Creative Officer (BBC Vision) - is an external hire. He comes from Channel 4 after several years at the BBC. Five had had experience working with ITV or Channel 4. Three - mostly in MC&A - have come from outside the media (Coca-Cola, Bass Brewers). None are BBC 'lifers', but all have some experience at the BBC - from four to around twenty years', to be more precise. Those involved with content - as opposed to marketing or HR - seem to have been around the BBC for longer.