I wanted a good walk around lens for a Nikon D700 that I'm getting this month. After reading a number of reviews and not wanting to break the bank I chose a Nikon 28-105 f3.5/4.5D with macro. They don't make this lens anymore but was able to find one here in mint condition. It has the same reproduction ratio as there dedicated macro's. The pics above were shot on my D100. I have 8 other Nikon lenses but none that cover this amount of focal range.
I've thought about it, but my kit is still very early on, so I have a list of priorities before I start playing with anything like those. Not that they wouldn't be fun, but if I had the $200 to invest in my kit a tripod is much more important to me. I'm hoping to pick up a Hakuba HG-503, it's basically Hakuba's take on the lower end Gitzos.
If I ever shoot a wedding it'll be very clear up front that I'll be taking my cues and direction from 2 people and/or their designated proxy, everyone else is welcome to tell me what to do and be ignored.