sorry for the delay. i just got sidetracked by work and new grilfriend 
Here's a link to my VB projekt. It's only one way Arduino -> VB, but i should be a piece of cake to also send the other way.
If anbody modify it please post here so we can share our VB <-> Arduino experiences
EDIT :
Wouldn't it be nice to make some kind of "generalised" VB class or component to interface with Arduino, mabe even some kind of dataexchange protocol on top of it ?