The ability to upload TIFF files has been enabled for Wikimedia sites, including Wikimedia Commons. Full thumbnailing features are not yet available for TIFF files, however the capability of uploading TIFF files will be useful for users who work on restoring historic images. (r48462, bug 17714)
Image moving (renaming) was briefly enabled on all Wikimedia sites. It was disabled again due to some remaining bugs. Use of this feature will initially be available to admins only. (bug 15842, bug 18033)
The developers have enabled an Upload-by-URL feature on test.wikipedia.org. This upload feature is not restricted by HTTP POST size limits, providing a way to upload files that are slightly larger than the new 100MB upload limit. The feature is currently available to test wiki admins only. In future, it may be expanded into a tool to allow fetching files from certain sites, such as Flickr or archive.org, and uploading them to Commons. 
The Wikimedia technical team has a new blog, where they will post updates and other technical issues.
The Wikimedia Foundation has been accepted into the Google Summer of Code program for 2009. Student applications for GSOC open on March 23 and close on April 3. There also is a need for mentors who can answer questions from the students and monitor their progress.