It has been a couple of years since Chrome overtook Internet Explorer in terms of browser market share, and while Internet Explorer continues to be extremely popular out of convenience for many, the Chrome browser has definitely attracted its fair share of new users thanks to its speed as well as speedy interface. This beta version of the 64-bit Chrome can be used if you happen to have a 64-bit system. Canary does come with near daily updates, and hence if you are looking for stability, this is not the version to download, but at least it gives you an extremely early peek into what Google is working on.
As for the Developer version, it caters for folks who want to have an inkling on what Google is working on without sacrificing stability. Do expect its fair share of bugs, but it will not number as many as the Canary build. [Press Release]