The current development kernel is 2.6.34-rc4, released on April 12, about
a week later than would have been expected. The delay was the result of a
nasty VM regression (see below). All told, some 500 fixes have been merged
since -rc3; see the announcement for the short-form changelog, or see the
full changelog for all the details.
There have been no stable updates released in the last week.