Amazon has finally stopped teasing and let the 2.5 Kindle firmware update loose for all and sundry. It had become available as a download for international users a few days ago, and as of today their American counterparts can partake in the same manual update. But only if they wish to be proactive. All Kindles that have their wireless connections turned on will be getting the drop over the next few weeks. So what's all the fuss about? In version 2.5, you'll be able to organize books into collections (or folders as most of us call them), share favored passages via Twitter and Facebook, zoom and pan around PDFs, lock down your Kindle with a password, and enjoy the benefits of two added large font sizes and improved sharpness all around. If that sounds too appealing to wait for, hit the source link to find the manual download and install instructions.