Popular blogging service Tumblr is finally recovering from its seemingly endless downtime . The final tally: over 24 hours, based on the tweet Tumblr sent out around 4PM PST yesterday announcing that it was "working quickly to recover from a major issue in one of our database clusters." Tumblr followed that up over the ensuing day with some intermittent (and overly optimistic) status updates, and tweeted an hour ago that "All blogs are online and we're incrementally restoring access to the Dashboard." Note that Tumbr isn't fully functional yet, as only some users can add content to their sites now. But at least visitors aren't getting an error message any more.