It's an interesting first step towards other research.  They were also touting 
the "shaping" ability of the ferrous metal in the solder.  Of course, they were 
also touting the "more environmentally friendly" silver and tin..... It could be 
the start of a new line of thinking that might lead to something useful.

Not that this anecdote means much, but I spent a (probably inordinate) 
amount of time in the Smithsonian gem & geology exhibit this weekend.  The 
only thing that anooyed me was noticing in the compositions of (the easily 
and rather safely mined) crystals, quite a lot of Pb.  Not much in the way of 
Ag or Sn, however..... I suppose I was the only one in the room that gave it 
a  thought.  Some of those crystals are quite amazing.

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