Does she really want a full-on cruise or just a trip down the river?

If the latter, my trip report may help: http://loraltravel.blogspot.com.au/2012/12/the-irrawaddy-road-from-mandalay.html

I'm afraid I can't help with the expensive version.

Cheers, Alan

The two major cruise lines in Burma are Pandaw and Orient Express (their boat is called the Road to Mandalay). Some people love these cruises, there are a number of good reports here. While I think a cruise would be very nice, I wouldn't consider it a substitute for time with your feet on the ground. Burma has much to see/do/experience and only a small part of it is along the Irrawaddy. It's not like Egypt, where most of the population lives on the narrow flood plain.

Kathie thanks....this is also my opinion. Have just discovered this forum and loving reading everyone's responses about their travel experiences!
Alan, thanks for your trip report, will take the time to look at also.

Suze, you might find my two trip reports on Burma to be helpful (just click on my name), and photos are at www.marlandc.com