While I'm not defending NTP here, I don't believe that a patent holder should forfeit their patent simply because they've done nothing to develop or promote their invention.
If this were the case, wealthy corporations would be steam-rolling the small-time inventor everywhere...this would effectively end individual creativity.
Nonetheless, like it or not, the deck was stacked against RIM from the beginning. You've got a foreign company (RIM), and a backwoods judge and jury obviously looking out for their own. It stinks...