Version 9.04 of Ubuntu Linux has been released. You can find the announcement e-mail (with relevant links) here.
Of particular interest may be the overview of changes, which can be found here.
On a note of interest to me (and people who have found my blog through its GTK+ posts) is the update of GTK+ to the 2.16.x series and of GLib to the 2.20.x series in this release.
We also have Glade 3.6.x in this release.