Dentition Woes, con't

Okay, remember how I said I had to have part of a root canal done last month?

Well, it just got worse.
Last week, while I was sitting at the computer and eating a muesli bar, I suddenly realised that there was something else in my mouth that definitely wasn't chewy...
I spit out the half-chewed bar, and amongst the oaty-fruity stuff was this:

AAAAARGH!!!

I had a look at my tooth in the mirror, and found my mouth in this state:

Yes, THIS IS (or rather WAS) the same tooth that was halfway through the root canal!

[IMG="http://picture_of_money_flying_away.jpg"]
So far, I haven't been able to see the dentist yet (well, it has been the Xmas/NYE period, hasn't it?) but I will be going in to make an appointment as soon as possible.
It doesn't hurt or anything, and I'm not angry so much at the discomfort (or cost) as I am at the complete waste of time this has been! If I'd known that it would just go and break at the least convenient time possible, I would have had it pulled out weeks ago.
Oh, well. Shall keep you all posted.