Encryption bricked my device - can't enter recovery

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http://forum.xda-developers.com – Google/Asus Nexus 7, brand new yesterday. The first thing I did was accept the OTA update to 4.1.1, and then reboot. I spend the day setting up my apps and things, then I went to encrypt the phone. At this point, I have a 5-digit numerical PIN. I leave it to do its stuff, and check back an hour later, and it's sitting on a screen saying "Type password to decrypt storage". So I enter my numerical PIN, and it says its incorrect. I enter my Google account password just in case, and that's incorrect too. So I go to do a hard-reset following some instructions on the Google (HowTos)