Three letter domain names dried up in 2009.
The main advantages of short domain names are:
1. easy to make a logo,
2. easy to remember and
3. easy to type into a phone.
To buy a three letter domain name now is incredibly expensive, that is
if you can find one for sale!
Example of qwe. qwe.com.au/4877
is a web application that took out the Douglas Business Innovations
Awards in 2012. It is the "Keys to Port Douglas" where the "4877" is the
Australian postcode for Port Douglas.