0.6.9 is out. I just found that CPU usage is lower; Apart from that, the main advantage is the growing base of users. YOU should come with us.
This is a good software. I was very pleasantly surprised with the download speed. I convinced some friends to switch from bittorrent to oneswarm, it simply rocks.
Now it needs a lot more users. And a C implementation on Linux, daemon-like (presently it's possible to work in headless configuration with xfvb, and access the web interface...)
Oh, and by the way, 0.6.5 is out since august, 3rd.