We used to host an automated signing form here, to allow people to become signatories of the Euston Manifesto. It became a victim of its own success, attracting spammers and spoof signatures. Like the rest of this Website, it was also subject to malicious computer attacks, including distributed denial-of-service attacks (DDOSs) like those that brought down Facebook and Twitter recently. Neither they nor we have the resources to defend against systematic onslaughts like that or to vet every new signatory in real time.
One of our more technically adept members is working on a new automated signing program, but that is not a trivial coding task. In the meantime, if you are interested in signing the manifesto, please email us via the front page contact link.