A month of the Hurd: Successful Google Summer of Code project: unionmount.
This month saw the successful completion of the Google Summer of Code 2009, for which Sergiu Ivanov created a unionmount translator. His work allows you to simply union one directory or translator into another one, so you see the files of both of them side by side.
He was mentored by Olaf Buddenhagen and both are now working on polishing the code and extending the namespace based translator selection (nsmux) which allows you to read a node with a selected translator by simply appending
,,<translator>to its name.
That aside, we saw the usual steady rate of enhancement discussions, as well as bugs getting fixed: X server crashing, preventing that GCC versions after 4.2 optimize too much, etc.