It would be great if you could easily add a license (public domain, GPL, BSD or your own) to a vi. This would be great especially for libraries such as device drivers, etc.
I think a good place for this could be File->Vi Properties. There could be a license tab where you either can choose from common pre-defined licenses or have a text entry box where you can add your own. If someone else uses the vi, that person can than easily find out if he can use this VI in for example commercial code.