One issue that I see little talk of is the effect of static electricity, you need to protect any of the devices from static. With Microdrives avoid magnetic fields, they maybe could wipe the files off.
The hardes uses of the cards is from the photojournalist community and there is a site run by Rob Galbraith that has a CF Database
and links to software that will help you recover images from a damaged card. I have had only had problems with SD cards the compact flash cards just keep working.
One tip that everyone seems to do take a copy device or laptop computer so you can backup the photos quickly. I found it a good way to get a starbucks on a long shoot