Just to confirm with Pork - it *used* to be a problem, as a lot of pork was infected with toxospirosis (I think...), but modern farming has virtually irradicated it - there hasn't been a case in the UK for I think 30 yrs (haven't got time to check the references on this, but it's something I looked up when we started feeding raw food to Honey...). There have been isolated cases in the USA, but these were generally in small-holdings rather than pork produced for general consumption.... you still get a lot of people who will tell you dogs shouldn't eat pork, but they're out-of-date in their advise... 
It's Aujeszky disease caused by a herpesvirus, wich wil enter the central nervsystem and wil be lethal to dogs. Here in Holland it is'nt recemanded pigs in Holland are al vacinated but not al pigs come from Holland.
Actually it was Trichinosis I was talking about - caused by Roundworm infestation.
Had never heard of Aujeszky disease, but on checking UK has been clear of Aujesky since 1991 (it first became a problem in the late 70's so also not to cause of the long-held belief that dogs shouldn't eat pork....). From a bit of research it seems that AD seems to be regarded in a similar vein as Foot and Mouth, so whole herds are destroyed if infection is suspected making it unlikely that meat from infected pigs would enter the food chain. Also the indications are that it doesn't remain in the meat once the animal is dead, though the authorities still wouldn't condone allowing meat from infected pigs to enter the food chain in any form.
Useful to know about, though - thanks for mentioning it!!! While it doesn't seem like there is a particular risk with what I feed Honey, it's good to know as I might well lay off Pork for a while if we did have a AD outbreak - and I definately like to be well informed about potential issues from what I feed!!
Another food-stuff for dogs to avoid is Macadamia Nuts, by the way... forgot about that one earlier on in the thread!
As far as the seaweed goes - Lynn seems to have made it very clear it was the form the seaweed was in (the indigestable root, acting in a similar way to the cob of corn-on-the-cob) that led to her tragic loss, rather than any chemical (etc) part of the seaweed. However I imagine Jeff & Annie's comment was rather more related to the fact that blue-green algae has killed several dogs... I would say I was suprised that other people seem to be suggesting it's good... this page might help explain away the inconsistency, though -
http://www.pet-health-care-gazette.com/2011/05/02/blue-green-algal-blooms-cyanobacteria-and-toxic-blooms/ - I guess the algae itself is beneficial unless and until it has produce the "toxic bloom".
You learn something new every day!!!
