No offense, but you probably won't see anyone posting ideas this early. You may get some general ideas as to where people may be going in their design. This is a competition after all.
Try looking at pictures from recent games with similar attributes. Maybe I can help:
2002 (Zone Zeal)
Robots had to score soccer balls into mobile goals.
2004 (FIRST Frenzy)
Robots had to score playground balls into both stationary and mobile goals.
2006 (Aim High)
Robots had to pick up poof balls and shoot them into an elevated goal.
