Effects

[scammish]

Can anyone tell me how this effect might be achieved? 

[Derek Cross]

It might be a third-party plug-in, but you can experiment with Photoshop's Filter > Blur > Radial Blur

(Make sure you experiment on a copy of your original image!)

[Semaphoric]

Filter > Stylize > Extrude.

[Chuck Uebele]

Yea, that's the extrude filter, as mentioned above.