from the article Chauncey referenced...
"The report stated the risks of heart attacks, strokes, congestive heart failure and death from heart disease increased significantly for those consuming more than 7,000 milligrams of sodium a day and for those consuming fewer than 3,000 milligrams of sodium a day.
Basically, the report says that consuming anything between 1-1/2 and 3 tsp of salt per day is just fine, and there were adverse effects from eating more than that or less than that."
That sounds fairly reasonable.... the trick is knowing how much you are actually eating. I've been surprised by reading the dietary info on stuff like bread, which contained a lot more salt than I expected. Canned foods, especially canned soup, is really loaded with salt. Sometimes I get the urge to buy some, read the label, and then put it back on the shelf. Oh... I almost forgot about a small frozen pizza that I liked... the salt content was much higher than I was expecting <sigh> Another good reason to mainly eat simple, unprocessed food.