I did build v4l into the las 6000 kernel I compiled. the svt680 cams are supported (aiptek vga1 --trio--) I haven't tried it out though, as the cam hasn't arrived.
The thing is I'm not familiar with the lighter v4l based editorsso much..and I don't see cinelerra going very well on a Z. The options do exist, though... spend some time looking at linux video editing software..google google google. If you get something, I'd love to know.