As an iPad 1 owner, and now an iPad 2 owner, I think that this whole issue is dramatically overblown. My iPad 1 had backlight bleed that I never noticed until this discussion started regarding the iPad 2. At thar point, I took my iPad 1 into a dark room and turned the backlight all the way up. Sure enough, there was backlight bleeding that I had never noticed in ten months of use. Not only that, it looked very much on a oar with the images that were posted of how "bad" the backlight bleeding on the iPad 2 is.
Now, I have an iPad 2, and, yes, it has backlight bleeding, too. Its backlight bleeding is roughly equivalent to what I saw on my iPad 1, and, frankly, I never notice it, unless I go looking for it...
My advice would be to not even worry about it.