Kindle uses a proprietary file format that requires us to have an agreement with Amazon to have distribution on, so the answer is no.
I think this is the same for Sony's E-reader.
Neither platform can handle color or images
Actually there is a way around this. Copy the text from the PDFs to a word document format (MS Word or other) and send it through their email system. They'll send a file a file back to you that is Kindle friendly.