Short is sweet; success is best served rare; and Twitter‘s valuation reaches $250 million. While there are no revenues that I’ve heard of, the company has nonetheless increased it’s valuation on the back of the impressive uptake it’s seen the recent months. I confess to being a bit of a Twit myself – checking in throughout the day to see what is being said and who is saying it. It’s been interesting to see how BusinessWeek has embraced the Twitter conversation in their “Vox Stimuli” experiment while all of the reporters and editors have prominently displayed their Twitter names on the site. From industry luminaries like Walt Mossberg to celebs like Demi Moore (@mrskutcher) and Ashton Kutcher (@aplusk) to the UK’s lovable talk show host Jonathan Ross (@wossy), people from all walks of life, work and leisure are signing up to chat us up in 140 characters or less. Maybe this bite0-sized attention span of ours has found it’s ultimate venue in the microblogging land of Twitter.