How do I make a cycles material that emulates the "Shadeless" setting of BI?

Now, I’m sure everyone’s first thought is to simply use an emission shader, but i don’t want it to emit light into the scene.

Can anyone help?

Thanks!

It’s the emission shader. If you don’t want the object to emit light, disable the relevant ray visibility switches. For example, uncheck diffuse if you don’t want it to cast light/GI on things. Alternately, you can use the light path node to make the emission shader camera only, but that has a little bit of extra render overhead.

Awesome!! Thanks, and it makes perfect sense too!