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I was wondering if any of you had any ideas on how I might setup a shader to look something like this (in Cycles):

enter image description here

It's a little bit frosted, but the main thing that I'm trying to acheive is the "bumpy" appearence. Thanks!

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    $\begingroup$ i think this effect is called "Etched Glass" $\endgroup$ – zeffii Jun 6 '15 at 21:04
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You can also use a bump node, which offers more control and tends to have fewer artifacts than the displacement output (see What is the difference between the displace socket and a bump map?):

enter image description here

The fake glass node group lets light pass through the glass more easily, see this answer.

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Just set up the nodes as pictured below. enter image description here

Add a Noise Texture node (Shift+A-->Texture-->Noise Texture) and play with its settings. Connect it to the Displacement socket of the Material Output node. Place a Math Node (Shift+A-->Converter-->Math) between them and set its type to Multiply to control the amount of the bumpiness. enter image description here

You may also increase the Roughness value of the Glass Node. I think you may not need to add a bumpiness then. Of course you can try to increase the Roughness value and add the bumpiness at the same time. enter image description here

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