Dealing w reflective surface between loud speakers

Hi all,

I know its not ideal to have a big plasma or LCD tv screen slap bang in the middle of your two front loudspeakers and yet i'm sure that i'm not alone in having precisely that!

In your experience how has/does a reflective surface between the speakers impact the perceived audio quality and what solutions have people found for this problem [other than moving the screen somewhere else]? Some form of absorbent cover for the screen might make sense but where would you source this?

Many thanks