The man here is Mr_Benefit aka Benedikt Gross. he published a tutorial here http://vvvv.meso.net/tiki-index.php?page=arduino01
What is lacking is a fully-featured patch to communicate with the arduino from vvvv without the developer having to do any custom arduino coding. See Hans-Christoph Steiner's "PDuino" patch and arduino firmware for a model of what we might do.
no :) check firmata+vvvv
We might use the SimpleMessageSystem library on the arduino side (though for me (nz), it's really the visual vvvv side that makes it tricky).