The shot above was taken in a professional macro studio. Actually, no it wasn't, it was taken inside a cardboard box, with the sides cut out and had pieces of copy paper taped over the holes to act as diffusers for my speedlights.
For a long time, I have had an interest in getting professional looking stock photography shots. Several years ago, I made my own macro studio with PVC and a white cotton bed sheet with pieces of white, black and colored cardboard to act as a seamless background. However, since I keep the pieces of PVC unglued, it does take some time to setup and tear down.
On the Strobist blog, I ran across a tutorial David Hobby posted on how to make a DIY macro studio out of a cardboard box in about 5 minutes! After seeing the results, I had to "build" one for myself and I have to say that I like this version better as the light is much more controllable and you can build one of these on location in most instances.
In this shot you can see that I left the flaps on the box to act as gobo's so I didn't get a flare into my lens from the speedlights. Also, you will notice I had my subject (a Nikon EM 35mm SLR) sitting on a piece of fairly reflective black formica. This gave a smallish reflection of the camera in the foreground. I also taped a piece of black construction paper to the back of the box to use as a black background.
If you notice my camera settings above, I actually used Auto FP High Speed Sync on my D300 to get the background as dark as I wanted to achieve the effect I was looking for. However, you could have easily done this with your camera's fastest, native flash sync speed (usually around 1/250 sec) and stopped your aperture down a bit more and/or decreased your flash power.
My flashes on this were at 1/4 power on the SB-800 camera right, and at 1/8 power on the SB-600 camera left. Both of these flashes were triggered with my Nikon's built-in CLS system.
This may seem difficult, but its absolutely not! Also, you can use a white piece of cardboard for your background as opposed to black. I just wanted to do this shot in a somewhat low-key black setting.
This method is easy, cheap and fun! Give it a try and you will be thoroughly impressed. Another good thing about his method is, if you damage your "macro studio" box, pitch it, and build another one! =)
::David Hobby's DIY Macro Studio on the Strobist blog::