[cliffsloane]

I just returned from the USA where I bought the Kindle 4 / wi-fi / $79 (BTW, what is the most accurate name for this? It would help searching the Boards for answers). Believe it or not, it is early impossible to buy any ebook reader in Thailand.

After agonizing over the device I wanted, I had settled on the PocketBook 9", but they closed their Seattle store and did not seem to answer their customer service number. So I tested out two devices (the latest Sony and the K4). I chose the K4 because, despite descriptions on several review sites, PDF display on the Sony was seriously flawed. It is not great on the K4, but adequate.

OK, the hack question.
Is it possible to change any of these myself?
1. Fonts or font darkness
2. Margins on PDFs? I can "nudge" a frame, but can I expand it too?
3. If a PDF has columns, can I hack a choice into the options for column width (as opposed to page width)?
4. Other hacking threads for other Kindles talked about enabling support for other formats. Is that even remotely possible on this one?

Thanks for any pointers you may have.