Google is now publishing a page outlining the platform versions in use, as measured by requests to the Android Market. In terms of Android Market statistics, this chart is…limited. However, it is interesting, and it will be even more interesting to see how frequently the chart gets updated.

The first thing that catches my eye is how many DROID users have gotten the upgrade to 2.0.1. That upgrade had been out for not much more than a week by the time the statistics were culled.

The 27.7% of users running Android 1.5 means developers should still try to support that release for the time being, if possible. I suspect this figure will plummet to under 10% sometime in March, as I am hopeful we will see upgrades for the HTC Hero and Motorola CLIQ in the not-too-distant future.

Of course, if the Nexus One ships (per rumors) and if it has Android 2.1 (per other rumors), developers will be faced with having to deal with four major active releases (1.5, 1.6, 2.0, 2.1), and I will seriously start questioning the sanity of various executives in Mountain View, CA…