sendVIMS is an external for Pure Data. with sendVIMS, you can send VIMS messages directly to veejay, and receive the complete status back. With a little patching and trial&error you could easily built a custom interface for a performance or installation.
I've whipped up some examples of what can be done in sendVIMS, wich also shows how fast a little prototyping can be done in pure data.
The pd patches in one tarbal: help-vims-patchestar.gz
1. Triggering actions with audio
shouting at the video makes it look weirder...
2. Create a midi - videomixer
As of 1.0, midi is built into veejay, making this example less useful. Still, it shows some basic controlling done easily... replace
3. Building your custom playback-scrubber
See the sound example, maybe connect these two?
4. A simple video sequencer
Simple sequencing, or multiple veejays all controlled by one shout, it can be done.
###A simple video sequencer