I've reconfigured the webserver to better deal with the attack. If you experience 429 errors post in the tech support thread
and very clearly describe what you were doing and what page you tried to access. Errors starting with 500 mean the server is down, error 429 means my net caught you. If you experience weird issues with images loading or uploading files, you should also report that. I've changed a ton of settings but the server is face-tanking 500 requests a second now.