Since the number of debugger modules in IDA surpassed the magical number seven plus or minus two, we created a small table describing what is available and what is not:

http://www.hex-rays.com/idapro/debugger/index.htm

Direct links to tutorials are available here:

http://www.hex-rays.com/idapro/idasupport.htm

I know, I know – we need to add 64-bit support for all platforms, port the Bochs debugger module to Linux, and… any other suggestions? I personally would love to have source level debugging, yet it requires some substantial changes to the kernel. We probably will move in this direction, sooner or later…