Thanks all!
Yes, 5 shot bracketing was used on my 1D3 at 10 frames per second. 4 frames were used in the final shot.
The HDR was hand-painted in PS, not actually using any HDR software per-se. I just aligned the layers and started with the brightest exposure, masking down. This gave me more control over ghosting when the people moved, and also resulted in a more (IMO) natural look.
Number 17 in the wedding set was a natural exposure: towards the end of the ceremony the pool of light moved to the right and decreased in intensity as the sun set: in that shot I chose to hide the extreme falloff by shooting from a lower angle and using the pews to hide the unlit areas.