Our Global WhoIs is a great tool for checking the current status of your domain.  It supports every top-level domain and just about every country code.  It returns a comprehensive status of your domain that you do not find in most WHOIS tools.  It starts shallow and digs deep giving you both the Internic and your Registrar's information about your domain.  With this you can tell whether your recent DNS server changes have been propagated to the root servers, whether your domain registration has completed, as well as many other useful details.  If you are wondering about the status of your domain, check it here before emailing support.