We also found some cleat covers made out of rubber to protect the cleats and give some grip when not on the bike (alas, they do not stop you walking like a duck).
LOL. I have those too. And yes, you still waddle. But they're great for going indoors and not wiping out on a slick floor surface.

This is a question for Speedplay users.
To float or not to float?!
Look has the same option on float, except it depends on the cleat you buy (red=float, black=no float). There may be pedals that don't allow it either, but I'm not familiar with that. Anyway, it's my bias that float is important for your knees. If you have strong knees, then no float would be ok I'd assume. But personally I don't, so I use the red cleats so I can have a little bit of movement.