I've spoken to the Developer. As I mentioned, there was a major release just a day or two ago. But one user uncovered what might be a bug in the update and Peter, the Developer, decided to pull it world-wide while he fixed the problem (which only occurs under rather specific circumstances). Peter is one of life's good guys and it's typical of him to put customers first in this way. He is re-submitting it to Apple probably today with that bug fixed and it should be back in the App Store, world-wide, as soon as Apple re-approve it. It's definitely worth the wait - it's in my top 5 apps and a must if you email to multiple recipients.
Thanks, Peter....
Tim