At document http://scn.sap.com/docs/DOC-40986 I try to sign up in order to login on the sample services. Pressing the sign up link in the document results in https://supsignformssapicl.hana.ondemand.com/SUPSignForms/error.jsp which says:
"The system is not accessible please have a look at the Operations Document for the system status or check back later. Thank you for your understanding"
Please help.