>>But I can see it's appeal (there have been too many instances where there's one person who does the phone interview and another the in person interview)

How does having a photo on a resume help prevent this? Are you referring to the interviewer? (i.e one person who conducts the phone interview and another the in person interview)

having a photo helps you know who it is that you are interviewing (to an extent...I look pretty different now compared to that on my passport (~4 yrs old) if that's saying something :/)

But what I mean is, resumes get passed around (from HR to team lead etc.) and having a photo helps identify the person being interviewed. (generally one person does the first interview, followed by an technical interview done by someone different - and it's very easy to get different people answer these interviews till the very last in-person interview - infact, I've seen a couple of friends do that at the big 4.)

I'm not saying that this will help but it's gives everyone a false sense of security.