Yeah, heat is the way to go. The dryer advice is good. Even when you want to eradicate bed bugs en masse from a room or building, the best way is just to fill the place with with heaters, close the doors, and leave it for a while. The bugs all dry up and die.
What's less admirable about that e-mail is the naked xenophobia (things come "...from companies outside of America, (sad but true)"). That's not sad, it's trade. Geez.
The message is only half about bed bugs; the other half is about how horrible "those countries" are. It's a well-crafted semantic virus -- it's encapsulated in a seemingly benign host ("bed bug advice!"), but once it has your interest and gets past your filters, it delivers its little package of prejudice, fear, and loathing ("those dirty foreign countries!"). Frankly if this message was true, I'd be most leery of anything coming from NYC.
No criticism of you though, Roamingguy -- I know you're just sharing it for the good part.