Sony's already made its commitment to the ePub e-book format fairly clear, but it does still have a lingering problem with some older e-book readers that don't support the format. While some of those are beyond hope, the company does now have an upgrade available for the PRS-500, although it's not quite as simple as you may hope. Turns out you actually have to send your reader in to Sony to receive the firmware update, which is completely free of charge and should take less than 14 days. For those looking to make a clean break with the past, however, Sony is also offering a trade-in program for the PRS-500, which will give you either $50 or $75 off the new Reader Pocket or Touch editions. Hit up the link below for complete details on both options.