>If you know of a lead-free formulation, I would sure like to hear what
 >it is called and what metals are present in it.  I'm sure there are many
 >others here among the bird&computer types who have the same potential
 >problem with solder globules around the house.  Tell us more!
Most lead-free solders I've seen are primarily silver. Some may also use 
bismuth (very low melting point; used in automatic fire sprinkler heads) but 
don't mark my word on that.
As for the little globules and blobs left behind after a rewiring or 
replumbing job, I just pick them suckers up and throw em out.  Since most 
solders have a high atomic number, that makes them probably too heavy to be 
picked up by your dusbuster cordless vacuum. Get a flashlight and tweezers to 
clean up. :) I do. :)
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