I like to send a note saying I've been selected for an interview, and would they be avaliable sometime. I put my phone number in it. But I dont attach my resume, because this gives me an opportunity to talk to the interviewer for five minutes over hte phone as we schedule it - at which point, he asks for my resume, and I probe about his background with a question or two or comment about my own interest in X or Y. This lets me take a peek at my resume to make sure its well aligned with his interests before emailing it.
Course, thats been my method cause I havent been able to "pick" my interviewers- they've been assigned.