There's also some information about the mechanics and the vessel's required frontal geometry in Greater than the Sum and Zero Sum Game, I believe? Basically, sleek and pointy is the way to slipstream velocities - As long as one has the benamite crystals, chroniton integrators and other thingummybobs.
I keep hoping that we'll see a Sovereign
-class retrofitted with quantum slipstream drive. I'm sure they wouldn't need too much jiggery-pokery to achieve it?
Where as something like a Nebula
-class is probably far to blunt and wide to carry it off?