To have the lens auto focus on the D60, you need Nikon AF-S, Sigma HSM or other lenses with the AF motor built into the lens BUT, AF isn't really necessary (or desirable) for Macro so the "usual suspects" are still in the frame, namely the 105mm f/2.8 Macro from Sigma and the 90mm f/2.8 Macro from Tamron. If FC is a bit more flush, he might be looking at the 105mm f/2.8G AF-S VR IF ED Micro Nikkor which will give you AF, Vibration Reduction and Macro capability. For a bit less, there's also a Nikkor 60mm f/2.8G AF-s, again, keeping AF but this time, no VR.