I just updated my two tutorial posts on adding custom sharing services to Sharedaddy, which is now bundled with Jetpack for WordPress:

These are by far the most popular posts here, so I thought I should give them some long overdue attention.

I’ve added the missing variables and have added Tumblr as a sharing service to the list. This weekend I hope to go through the rest of the requests and add them into the post, as well as clean up some of the markup, which doesn’t play as nice with my new theme so it looks kind of ugly right now.