I'm considering asking Santa a Kindle Paperwhite.
My primary use would be to read scientific papers, mostly about physics, and with equations. These papers would be in PDF format, and often two columns.
What can I expect then ? Is there a need to convert/reformat the PDF firsts ? How does the kindle paperwhite display equations, and/or non roman alphabets ?
As mentioned, k2pdfopt is the best choice. To make it easier to use, I made this service for anyone want to read academic papers on kindle like me. Link: http://wooya.me/post/kindle-pdf-optimization-service/