I figured a thread with links to everyone of my ideas would be fine. Here they are, click any and all!
Far Cry 2 Combination: http://halo.xbox.com/forums/games/f/9/t/2495.aspx
Key Cards: http://halo.xbox.com/forums/games/f/9/t/2497.aspx
Gun Dispensers: http://halo.xbox.com/forums/games/f/9/t/2581.aspx
Original Creator: http://halo.xbox.com/forums/games/f/9/t/2794.aspx
Enjoy, friends! Remember, more are being added as they come out!