I've also used the carabiner approach for a long time, and can't do without it. However, I really like the one you're using, so I've added it to my Amazon shopping list! As far as USB keys go, I also always have one, but I literally love the one that I use, which goes so far as to look like a key. the advantage is that it lies flush with the rest of my keys, and minimizes as much bulk as possible. http://amzn.to/dhskTC