MIRI is in fact running a matching fundraiser at the moment, by the way. I'm not exactly sure why there wasn't an official post about it.
IIRC, they've delayed making that post at least once because they wanted to see how much difference the post made to donation rates.
For those who haven't heard, CFAR is holding a matching fundraiser from now until Jan 31, 2014, up to $150,000 USD.
Link: http://rationality.org/fundraiser2013/