I recently checked out Twitter, to see what it was about. It first is addicting. I also found it is hard to discuss different topics with one twitter account. I find it hard to follow a fly tyer who was also a fan of hockey. (I like hockey too but, it gets confusing, kind of like listening to two conversations at the same time.)
I need to check out apps to make seperation of topics happen. I am still learning so we'll see how it goes.