We're probably going to use some sort of roller. Basically you just have a spinning rod a few inches off the ground that pulls game pieces in as they touch the spinning roller. I recommend experimenting with different heights and materials to optimize it, but I can guarantee from experience that the general concept works great.
Another concept that I was kicking around a few days ago was a set of two arms that would extend out of your bot to the ground, tighten together around a ball caught in the middle, and lift back up to deposit in a hopper or shooter. Much slower and more complicated than a roller, but it could be useful for manipulating the bridge as well if you build it right.
Just a few for right now, might post more if any pop up.
Cheers
