New to Typophile? Accounts are free, and easy to set up.
Create an account
Typophile RSS | More Feeds
It looks just like Perpetua Titling, except the top serif on the ‹A›, which I’m guessing was probably altered for the logo.
It does indeed resemble Perpetua Titling Light MT, and it may be someone's interpretation under another name because there are other differences in all glyphs except for the /I. It could also be that it was modified especially for this logo.
If you need to come close, then Perpetua Titling Light MT is the font of choice. If you need an exact match, then more looking is in order.
That being said, if it was modified especially for the logo, and I strongly suspect that it was, then you will not likely find it as a complete font.