Here’s how it works: Reach.ly mines the public Twitter firehose and uses semantic algorithms to weed out messages from users who announce travel to particular cities in the near future. Hotels can then analyze the tweets and reach out directly to these potential guests. Some people will inevitably complain that Reach.ly in a way facilitates unsolicited tweeting – some might even call it spamming – but some might actually benefit from engaging in direct conversations with hotels, although hotel marketers might have to go the extra mile and offer a discount or something to appease users. Reach.ly says hotels are just the first step, and plans future applications of its technology for a range of travel-related searches, including car rentals and airline tickets, as well as other vertical markets. Get the full story at TechCrunch Related Link: Reach.ly