Are you talking about an effect something like a FS2 jump with a lightning like effect? The "lightning" could arc to the smaller ships in some sort of chaining effect. Any ship that picks up enough of the energy could also jump. Also has the evil side of a possible use as a weapon. Ships just out of range that get hit by the arc could be destroyed when the rest jump.
No, not really. More like a ... how to describe it ... sort of a sticky shockwave, I guess? I'm not sure how you got that idea from what I wrote, actually... I was thinking actually that it might be better to limit the effect so that it only affect ships that deliberately 'tap into' the field. However, doing so would be fairly easy, so small fighters could pursue a fleeing enemy ship, etc. However, doing so could leave them stranded in an unknown location.
just rip off Galactica [...] flash, and inexplicably reappear in a flash at its destination, preserving momentum of course.
No offense to BSG, but I don't really care for that effect. I mean, sure, it's simple, but it's a little too simple.
I have thought about the idea I came up with a little more, and I think I've decided what it might look like when ships emerge from this FTL transit system back into normal space...
Imagine the end result of the effect, or a little before. There is a wispy glow, possibly some distortion, in a shape sort of like the ships that were affected, but much larger, and with most of the angles smoothed out during the expansion of the wave.
Basically, the warp-in effect would be the same as the warp-out effect, but in reverse. The wispy maybe-distorted glows shrink around the ships sort of like shrink wrap, and increase in brightness as they get closer. At the moments when the effect passes through the hull, it is exactly parallel to the hull at that point, and the hull there appears (being invisible before), and is glowing, like it is just before the ships jump out. The thickened, shrink-wrapped wisps are now gone, and the glow fades, revealing the hull in normal colors.