A recurring discussion within certain circles over the years has been the potential assignment of single character domain names in the generic top-level domains (gTLDs). Prior to the formation of ICANN, and despite assignment of a few single character domain names (q.com, x.com, z.com, i.net, q.net, and x.org), single character domain names had been reserved and rendered unregistrable. The historical reasons for this reservation are sometimes debated, but it is universally recognized that there is no valid technical reason for them to remain unregistrable.
The subject of allocating single character domain names has captured the attention of the ICANN community to varying degrees from time to time, primarily depending on the interested efforts of Overstock.com and its advocates.
It’s always something, and always someone!