We somehow managed to miss this at the time - but the BBC has a page of stunning images of Heathrow Terminal 5. There are panoramas of the various sections of the terminal, as well as superb 360 degree photo-imagery, where you can zoom in, out and rotate to your hearts content.
Hopefully, all the ancilliary services around the airport will begin to offer similar services ie Heathrow Airport Hotels - they really give an insight into the place you are visiting.
