That's interesting that not many people carry them...with that said, most people in the US tend not to as well, although I personally cannot imagine not having something on me. I use it from everything to opening letters to cutting paper to cutting food at my office! In the US, it seems you see more people carrying knives in rural areas where work is often more hands-on and daily life often requires a cutting tool. I started carrying a knife when working on a farm and when fishing/crabbing as a kid...even tho I now live in the city and work in an office, the tradition just kind of stuck as I got used to always having a knife (and a multi-tool as I carry a Victorinox SwissTool Spirit+ or a Victorinox Tinker SAK in every bag I own and am always in reach of one!)
If you definitely need to stay Chive-sized, the Dragonfly is perhaps too large then. The blade isn't a whole lot longer, but it is a larger profile. It's intention was to give a small knife a little more leverage and is one of my personal favorites as it is capable of handling tasks of larger knives. By being wider, the profile is too noticeable...which if you arent close to a place that stocks them, is kind of a risk if it turns out being too large.
Spyderco's ClipiTool lines are a little smaller and incredibly cool knives. I have not used one myself yet, but have read really good things and will buy one soon. The steel isn't quite as good as VG-10, but having a knife with a second serrated knife or second pair of scissors in a handle under 70mm is a nice compact tool (plus the serrated knife can be used for heavier tasks like cutting cardboard to save the edge on the primary PE blade). They are very affordable (least in the US), but may not be easy to find as they were just released. Their LadyBug 3 is like 50mm long, so it is even more compact (and VG-10 steel)...I love mine, but this is a size below the Chive. Spyderco's Spin is also really cool, but recently discontinued and hard to find...it's super small but surprisingly capable for its size (the Cricket is as well.)
Benchmade for a while made a model called the Benchmite, and I absolutely love it. They made a standard, auto, and value line. At the time, the value lines were only like 25-35 USD. But they are out of production and harder to find now for a good price. The value models are called the Benchmite 2 technically.
If you like the size, the LadyBug 3 is made in VG-10 standard which is excellent, but also in ZDP-189 and Super Blue, which have shocking edge retention. I've seen the Super Blue version in the US for around $40 USD. Super Blue is an amazing steel and its performance blows me away. Unlike ZDP, it is easy to sharpen.
http://www.spyderco.com/catalog/details.php?product=874