You can still work on your new account until your domain name finds it way to our servers using your  "IP Number", which was included in your welcoming email. 

Your IP number is how your new domain will be identified on our servers. Using it at this point will provide a means for you to access your account, as well as test your new site by using something like

http:// 000.000.000.000/~username/ 

One easy way to check and see if your domain is answering to our servers yet, is to create a file called "test.html" and place it in your web directory.  

Keep checking the URL

http://www.yourdomain.com/test.html

and see if it works. 

When it does, you'll know your domain name is answering to your account on "our servers", and has been officially transferred.