That's as may be, but I can't help wondering if this is a gadget designed to solve a problem that doesn't really exist. Although Twitter is becoming more mainstream, discussed on everything from This Morning in the UK to Oprah in the US, the fact remains that it is still a relatively niche service. As such, many of its users tend to be natural early adopters -- the tech-savvy and digitally engaged who own the latest smartphones, and are at home with the idea of accessing Twitter through third-party mobile services.