Tumblr has just rolled out a new feature that should make the Tumblr brigade (aka probloggers on Tumblr) rejoice!
It looks like users will now be able to add as well as edit tags upon numerous posts, as well as remove posts en masse without having to open up each one separately.
Still very beta, Tumblr’s new mass post editor currently supports editing tags and deleting multiple posts. More options are in the works.
You’ll see the “Mass-editor” button when viewing your blog on the Dashboard. (Official Tumblr Blog)
Tumblr’s mass editor is even easier to use than Google’s Blogger (which truth be told is light year’s ahead of WordPress).