Came across these whilst searching for something else:
http://www.coherent.com/Lasers/index...w.page&id=1713
Coherent are now doing USB laser heads which connect to your pc and measure power levels or even beam profiles on the optical versions entirely using software and the sensor. What's more they claim the same accuracy as a dedicated meter with additional analysis features.
Thought this might be of interest because most people use laptops or netbooks for laser displays anyway. So rather than packing a laser head + power meter + laptop / net book potentially you only need the laptop / netbook which you'd have anyway and a laser head thus saving space.