The economics: for a very low initial cost ($2k per TLD, plus $5k for a
machine an internet connection), there is a potentially large revenue
stream (it doesn't take many $50/year customers to recoup the initial
investment, and the number of potential customers is very large).
.fm (kroq.fm or kroq.1067.fm)
(etc., these can be used for event-specific pages)
.wine (don't know if they have to be three letters long).
The major problem would be that it would require some effort to actually
administer sales of domain names.
Any interest in actually purchasing a TLD or two?