I've come to the conclusion that the best use for a myspace page is just a information page and a fan site. Really it's basically like a digital business card. Myspace is availible more and more by phone. So if you want just some information on what you do and your methods for people to reference, use myspace. I use it to post my beliefs and what I do and what I am trained in. My blogs are private and for my use only. I do have one blog that I set the date for 3 years later because that one I give a explaination of what I do and why.
But if you're more secretive, then just have a e-mail.