O2 has removed the need to buy gadgets such as ThinkGeek's sim card back-up tool, today announcing the (re)launch of Bluebook - an online service that backs up customers' contacts, texts and picture messages. They first demo-ed this late 2006. It's free, and automatic, with customers asked simply to register for the service. Once saved, the texts and picture messages can be edited or even saved in online albums, which you can then share with friends or publish on your O2 Bluebook blogging platform, Blueblog. Adding to that, photos...