I used the magnifying glass trick in a lot of my earlier photos. I think it's in the tutorial I wrote for DPC too. Glad to see it works for other people as well.
What I really like about this shot is how the photos really are nothing more than a background to the tack. The Focus on the tack is wonderful and the DOF really helps that to stand out and be something more than 'just a photo of a tack'.
Lighting is great, no bright spots or distracting shadows. I like the angle you chose for this. It's not directly head on, but not a straight side photo either. Nice in-between.
Interesting to look at, technically well done. The only nit-pick I would have is that you DID stab the guy in the head. Maybe a different photo there might be a little less weird, but still an alright shot.
~Heather~
Ow! You impaled him. There are no TACKS in this image! ;) I think the green and red tacks balance each other out. I like the composition and the DOF. POV okay. 6 from me!
'Tacks for the memories ...' Isn't that how the tune goes? Or do we not remember Bob Hope? I appreciate that the colors all work well together. I like the use depth of field.