The news many of you have been waiting for...
The OpenML SDK, version 1.1, is now available as Open Source. It is on SourceForge, at:
From this project page, you may choose to download pre-packaged SDKs, including source and binaries for Linux or Win32, or you may use CVS to access the source code.
Release 1.1 includes small fixes from 1.0; full release notes for the release will be available on the OpenML web page -- http://www.khronos.org/openml -- shortly.