STEP1. What is?
Marketing phenomenon that facilitates and encourages people to pass along a marketing message.
Synonyms: word-of-mouth marketing (marketingterms.com)
B. Viral marketing and viral advertising refer to marketing techniques that use pre-existing social networks to produce exponential increases in brand awareness, through self-replicating viral processes, analogous to the spread of a computer virus. It can often be word-of-mouth delivered and enhanced online; it can harness the network effect of the Internet and can be very useful in reaching a large number of people rapidly. (Wikipedia)
C. What is viral marketing? In 1997, when DFJ first coined the term in the Netscape newsletter, we used several examples to illustrate the phenomenon, without defining it more precisely than “network-enhanced word of mouth.” Its original inspiration came from the pattern of adoption of Hotmail beginning with its launch in 1996. Tim Draper persuaded the company to include a promotional pitch for its Web-based email with a clickable URL in every outbound message sent by a Hotmail user. Therein lay one of the critical elements of viral marketing: every customer becomes an involuntary salesperson simply by using the product. (Steve Jurvetson)
STEP2. Live examples?
Check out http://www.theviralfactory.com/
STEP3. Domain registry?
viralmarketing.ro is unregistered (yet)