I’ve been working on a post talking about the challenges that Twitter has faced lately and why I think they’re on shaky ground these days, but before I get a chance to finish it and post it here I figured I’d link to a post on the Twitter blog where they answer a number of technical questions that people (notably TechCrunch) have been asking them. I give them kudos for addressing these questions publicly and for permitting transparency into their operations and technical challenges. As I see it, however, they’re still not out of the woods yet, even if I (and most of the Twittersphere) am pulling for them in…