People ARE donating with Bitcoins. This is their public donation address: http://blockexplorer.com/address/1HB5XMLmzFVj8ALj6mfBsbifRoD4miY36v

As you can see, there have been a good amount of transactions after they announced that they're under a financial blockade. And that's only the public address, some people have most likely donated to a unique address.