A couple of minutes Googling leads to this article http://www.medscape.com/viewarticle/768914_1 http://www.medscape.com/viewarticle/768914_1 which links to Amer

A couple of minutes Googling leads to this article http://www.medscape.com/viewarticle/768914_1 http://www.medscape.com/viewarticle/768914_1 which links to American Assembly of Men in Nursing, which is doing just what you say. Also has interesting notes on how nursing came to be female-dominated and what steps might be taken to change that.