Was there not a Prequel for this week's episode?
Since I do not live in the UK and therefore don't have access to the many of the things on the BBC's official DW website, the only way I can get to see the Prequels is to watch them on YouTube, but thus far there has not been one posted for this week. So I was just wondering whether or not one was actually released on the official site that just hasn't made it onto YouTube yet.
They're not doing one for every episode. In fact I think there's only 3 being done for the whole season.
Incidentally, these videos can be accessed on the website. I was quite surprised to learn this, but virtually all the promotional video material on the BBC website this year, including the prequels, those weird "...Are Coming" blipverts, etc., is all available in North America. Someone at the BBC must have either smartened up, or BBC America cut a deal.
(And also, any video posted to the BBC site that isn't accessible outside the UK is always up on YouTube - often on the BBC's own channel - within minutes. So you never miss anything if you know where to look. The only stuff that doesn't tend to work are games, and even then I was able to play Amy's History Hunt last year...)
EDIT: Almost forgot, a nitpick. Didn't Idris say the Doctor's been travelling in the TARDIS for 700 years? I guess if we accept his age as 900 this would mean he was 200 whe he took the TARDIS. But then the Ninth Doctor actually said "900 years of phone box travel" making it clear he's had the TARDIS for 900 years. But then, the Doctor's age is so much a contrived mess that it's only logical the lenght of time he's had the TARDIS would be too.
Apparently on at least 2 occasions Moffat has written dialogue in which the Doctor admits he doesn't know how old he is anymore. It's not official yet because neither occasion has made it on screen (or even into a deleted scene) yet, but it's only a matter of time. I would take Idris' number as definitive because of the nature of the character, but no one's ever equated the Doctor's age with how long he's travelled in the TARDIS. (Also, we don't know everything the Doctor did for the first "200" years of his life - he might have spent much of it piloting TARDISes in a sanctioned way. Maybe that's how Idris (or should we be calling her "Sexy" now?

Awww gimme a break. I'm a Pertwee/Tennant fan, so I like a Doctor who wears his heart a bit on his sleeve. Yes hes gotten outraged or upset a handful of times, but far too infrequently for my taste.
The Doctor's not human, so he works by his own rules. Also, remember this is a guy who wiped out his entire race. I think "emotionally damaged" doesn't even begin to cover that sort of baggage (which is actually addressed in this episode, too).
Alex