79 this year also had a really cool and quick hanging mechanism, sometimes they even went much higher than was necessary (it was cool to see that)
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78's rolling hanger mechanism was also very innovative.
71 had in incredibly innovative robot back in 2004! The only robot I have seen to simultaneously hang AND score a 2x ball. Very nice!
They also had a pretty innovative bot back in 2005. They were able to carry multiple tetras similar to 469.
I think the most innovative robot I have ever seen so far was, obviously, 469's robot this year. I don't think I have ever seen a robot in action that could successfully "break the game" like 469 could. I didn't even think it was possible! They had an incredible machine that had the entire FIRST nation baffled as to how they could compete against such an awesome robot.