You might have seen the announcement about .NET for Google Apps, the new .NET client library is released. You can download it, including binaries for Windows Mobile and documentation, at:

http://code.google.com/p/google-gdata/

The release notes are on the wiki page:

http://code.google.com/p/google-gdata/wiki/ReleaseNotes

If someone wonders why we jumped from 1.0.9.4 to .6: i will give the interim builds in subversion a release number as well (which was .5), so that we have an easier time distinguishing different user versions.

As this fixes issues logging into hosted accounts and captcha challenges, you might want to upgrade if you have run into these particular issues.