It usually takes 24-48 hours for a domain to fully propagate. This is not a limitation from us, but rather the technology that all domain names use worldwide.
If you are using your domain name with an MD GreenHost webhosting account, then you may access your account using the following details until your domain name propegates:
Website: mdgreenhost.com.au/~yourcpanelusername FTP: ftp.mdgreenhost.com.au - usernames and passwords the same as your welcome email. CPANEL mdgreenhost.com.au/cpanel
Email will not work until propegation has ocurred.