I have heard one method of brute-force desoldering that involves a
blowtorch, so you melt the whole board's solder joints all at once and
knock
the board down into a trash can to trap all the parts that come loose. I
have not tried this myself, though, and cannot vouch for how well it
works.



I've used a heat gun to do something like that before, works pretty well,
though it's obviously only for salvage purposes.