I love the idea of guests suggesting songs. I plan on putting a form for song request onto my wedding website. The only person I need to worry about is the FIL because he's likely to request Black Sabath!
My FI still hasn't picked anything for him and the guys to wear either. He's away for work right now but when he gets back I'm taking him hostage until he figures things out! For his ribs comment, I think I should leave him to plan everything else, pick the cake, the flowers, which pretty bows will go on the chairs, etc..