The donation address and its view key are also found in the README.md file in the bitmonero repository. They can be verified by a GPG signature there: https://github.com/monero-project/bitmonero/blob/master/README.md, quoting:
The Monero donation address is: 44AFFq5kSiGBoZ4NMDwYtN18obc8AemS33DBLWs3H7otXft3XjrpDtQGv7SqSsaBYBb98uNbr2VBBEt7f2wfn3RVGQBEP3A (viewkey: f359631075708155cc3d92a32b75a7d02a5dcf27756707b47a2b31b21c389501)
Note that, as it is, using the view key can tell you how much was received, but also change if monero was sent from that address. Change can be substantial, especially if it accumulates with small spends.
In order to see the full balance after any spends, you'd need to import a list of signed key images (a very recent addition to the monero simplewallet). Since it's a very new addition, I doubt anyone used that ability yet.
I think the clearest I've seen about donations and expenses can be found under the "Finances" heading at https://getmonero.org/2016/02/10/monero-missive-2015-year-in-review.html