This may have been posted before but I was doing a tut and the plugin that I downloaded from the tut link is a marvel I tell ya lol. It's a remove white plugin and I liked it so much I thought I'd share it with you guys. I will provide the link to the plugin, but you should do the tut on Wompietuts (not sure I could provide the tut link at all here) so that you get the important steps for using the plugin. There are quite a few good tuts on her page the one I'm talking about is close to the bottom.
This would have been so much easier if I could just share the link for the tut, I've rewritten this post 4 times trying to not break any rules lol. Here's her home page ;o)
Here is a link that might be useful: remove white plugin