OpenID is normally pretty simple but it seems MAKE's implementation is totally borked. A lot of sites make it really easy by giving you a list of OpenID URLs to pick from, for example StackOverflow does this, http://stackoverflow.com/users/login. Since your Google profile IS an OpenID you can just put your profile URL into the login box, http://www.google.com/profiles/yourusername. If you don't trust the website with your profile URL Google also provides a redirector that works as an OpenID at https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.google.com%2Faccounts%2Fo8%2Fid.