Henry Spencer is describing the technical issues of the realm between low suborbit and orbit. His bottom line (which which I agree): there’s not a lot of market to justify investment for mid-range performance, including ballistic trajectories, because they need almost as much performance as orbit.
Thinks that there may be a role for suborbitals as a first stage for nanosats, and it may be possible to make some money on it, but they’re not going to be willing to pay a lot for a launch, particularly considering that piggybacking on orbital launches isn’t that expensive. Not a lot of utility to cubesats to date, most of them “solar arrays with radios.”
[Update a while later]
Sorry, there was a whole lot of other discussion, but it wasn’t completely jointed, and I was distracted. I saw Clark Lindsey taking notes, though, so I’ll bet he’ll have something posted later this evening.
Sure enough, here it is. He also has some notes from the later afternoon sessions.