Good news, everyone. Tumblr’s Fan Mail feature is rolling out; I just got it.

Couple quick thoughts: the interface is nice and simple, but there doesn’t seem to be any auto-complete mechanism built into the address form. The only addressing aid I ran into is when I typed a blog name that I knew was wrong (finerwebb)—an error told me “Sorry, you can’t send this blog Fan Mail at this time.”

There are options to reply and delete Fan Mail, but not to publish. Apparently this is supposed to be Tumblr’s new Twitter DM-like feature, as people were using Submit way too much to send each other private messages via Tumblr.

If Tumblr has to process media for your post (typically a video you upload), it displays this homage to the early days of TV to convey your media is still in the oven. A “Processing” item also appears in your blog’s sidebar to collect all posts with media that’s cookin’.

Tumblr Staff:

Pro Tip: Hold Option (Alt in Windows) while editing an Answer post to expose some extra publishing options!

If you want to have a post on Tumblr in which people can post an “Answer,” the posting interface displays the option as long as you end the post with a question. Both existing Tumblr users and non-Tumblr users can answer in a form that appears on the post.

If you’re using Tumblr’s submission feature to run a crowd-sourced blog, you can add optional tags that appear in the submission form for visitors. This is a great way encourage submitters to help organize their posts and make them more visible across your site and the Tumblr community.

Christopher White:

I saw Nicholas Penree’s post Adding Digg Sharing to Fever earlier and I hadn’t realized just how easy it was to add sharing options to Fever.

He breaks down some basics for adding sharing features for Tumblr—or, really, any service—to Fever, Shaun Inman’s self-hosted news reader.