Don't know what bokeh is? In photography, bokeh is the blur or the aesthetic quality of the blur, in out-of-focus areas of the photo (or the way the lens renders out-of-focus points of light). Still don't understand? Here, have a look...
You can even place an object (or person) in front and achieve this...here is one with my Christmas 2010 Royal Doulton
Want to know how to achieve this effect (great for Christmas lights), try this tute on Photobucket (this is an easy one that explains it for both DSLR cameras and point and shoot cameras) or here (a video that explains it). Give it a try....it is not hard at all. I even want to make shapes for my lens and try it...like this one at Digital Photography School or this one at DIY Photography.