I WAS  a Dean 1 in Iowa. I never received such a call. You might find it hard to believe, but in Iowa the caucus locations can be found in your local  paper. I had EVERY campaign call me to see if I knew where my caucus was. Many caucuses in Iowa are at someone's house! I just don't see that many people getting confused. If you are elderly, chances are someone's campaign picked you up and took you to your caucus.
 Why Dean lost in Iowa cannot be blamed on a few phone calls.( Are you trying to tell me such a message wasn't caught on ONE person's phone mail for proof of such a practice?) He lost because many people were undecided until the very end. Hollywood stars and Al Gore don't have much sway here.
The endorsement of John Edwards by the Des Moines Register cannot be underestimated. His campaign in Iowa was chaired by Roxanne Conlin, a very popular politition in Iowa. He won over a lot of people at the very end who went to see him after the endorsement by the state paper. His name seemed to be on everyone's lips the weekend before the caucus.
I feel that many Iowans were very excited about the many kids that Dean brought into the party. So many people I talked to hated to caucus for someone else and let the kids down. But, in the end they wanted someone less risky.
In my humble opinion they admired his campaign and ideas, but just didn't like him or trust him.
There were many people at my caucus who saw all their hopes dashed by a poor showing of their candidate.But only one campaign and it's believers have handled it with class- and that is the campaign of Dick Gephardt. You win some and lose some.Think of the people who have a lot more to lose in this election than a disappointment that their man didn't win. People who need health care, civil rights, a job, an education, retirement security.