Sadly, no place seems to exchange foreign coins for US cash. Most Canadian I throw back into hand rolls, that's what the tellers do or so they told me - plus they gave it to me so I don't feel guilty. If it's not Canadian I keep it. I tell myself that one day I'll go to Bermuda and spend all of my coins on some unlucky soul to get a beer.
A quick tally shows that so far I've found:
$193.49 Canadian (a few cases of beer)
$.50 Bahamas (a bad tip for a beer)
$5.03 Bermuda (one beer)
2.41 UK pounds (1/2 a beer if I'm lucky)
$.32 Euro (an extremely bad tip for a beer)
-Brian