Sony today released its PRS-500 Reader Portable Reader System pre-orders at sonystyle.com, which will hit retail stores by the end of October. The device has been delayed several times, with the last volley of delays occuring just this past July. The PRS-500 tablet-like shape features a high-resolution display designed to mimic traditional paper and is readable even in bright sunlight. With battery life equivalent to roughly 7,500 continuous page turns, readers can store and display personal documents in Adobe PDF format, RTF, text, JPEG photos and selected RSS feeds from blogs and news sites. Sony has also announced its CONNECT eBook store with more than 10,000 eBook titles available. And for a limited time, when a Reader is registered on the CONNECT site, people will receive a $50 credit towards the purchase eBooks online.