AVRminiProg is a programmer only, isn't?
With JTAG ICE MkII you can also debug your programs via JTAG or DebugWire.
I have an MkI clone. Unfortunatelly it does not support the newer devices.
can u mention what device that doesnt support that JTAG? I'm new learner in using AVR. before, I'm using PIC microcontroller. now I'm using atmega8 and atmega128.