The best thing about Twitter is the evolution of the concept. I feel too lucky to enter the Internet Marketing world at the right time - to be able to watch that evolution. Yes, every (even great) idea can be abused and accompanied with spam: thousands of Twitter bots spamming people by sending them public replies and adding to friends are annoying. This post is not about those. This post is about useful Twitter bots - it's about creative approache s to everything,