This is pretty cool! Very useful!

Great, could come handy.

Awesome and very useful for learning cycles node! Thanks!

I have no idea why I'd use this, but I really want to now.

if you could do a tutorial, it would be great.

I'm not sure where would I use this but it looks really cool

Thanks! looks really cool

Thanks! I created a Group, and added it to my Cycles Node Library. FYI: 7 years later, and it works in version 2.80 beta (rel. 1/28/2019)! Enduring, to be sure.