Remember, the people on non immigrant VISAs are ALIENs
I do not think that anyone is going to support the email campaign or other way.
Lawyers of AILA will not support because they would be more happy and would be getting more business if there is more mess at the working style of INS.
Existing GC holders / Citizens would not come ahead to support the cause because most of them do not want H1B people and temporary workers as its a threat to their job!!!
Big organizations / employers will not support you because their hands are tightened by Labor Laws , Budget Cuts , slowing of the economy and weaker sales and hence less revenues.