Maybe you tweet mostly about lunch, or other seemingly inane things, but your Twitter stream forms something of a journal for most users. It is a micro-blog, after all. Now, Twitter CEO Dick Costolo is saying you’ll be able to download all your past tweets by the end of the year. For the moment you have to use third-party services if you want to keep tweets on hand for posterity, and if you reached the 3,200-tweet API limit before you started, some of those early ones are effectively lost. From the sounds of it, Twitter’s official backup tool could bail those folks out. Read the full story at Gizmodo.