Briss often does a great job of cutting away the margins in PDFs making many of them quite readable on a regular kindle (and I can only imagine that it is quite a bit better on a kindle paperwhite or other devices with a similar resolution).
I have suggested to the Kindle team that they trim the margins off of the pdf files, which will make for a big improvement in pdf readability. But, nobody listens to me :-( Perhaps if more of you guys made the same suggestion, it will bubble up in priority.
P.S. I will check out the briss app. Looks like a great idea.
Thanks for the tip; I'll definitely check it out. I have an HP TouchPad (running Cyanogen Mod) that those might be readable on (still not the e-Ink, full-sunlight-readable experience that I truly crave, but it would still be a step in the right direction ^_^)
http://sourceforge.net/projects/briss/