Tarpipe streamlines your updates to various social web sites, creating simple or complex workflows to update several buckets in one fell swoop. Let's say you want to do something simple like upload a new picture to Flickr and then tweet about it on Twitter. Normally you'd need to upload the photo to Flickr, find the URL of the pic, run it through some sort of URL shrinker, and then update your Twitter account with the shrunken link to the Flickr page. It may not seem like all that much work, but Tarpipe can tackle this entire process in one step—all you have to do is send one email.
Tarpipe creates custom email addresses that, when emailed, run through a pre-defined set of actions to update any service you define. Creating a custom workflow will look very familiar if you've ever used Yahoo Pipes, but rather than creating custom RSS feeds like Pipes, Tarpipes creates custom social media workflows. The site supports integration with Pownce, Flickr, PhotoBucket, Tumblr, Plurk, Evernote, Delicious, TinyURL, FriendFeed, Twitter, and tons more, so if you use more than one of these sites, Tarpipe could come in really handy.
These guys have done everything correct like ping.fm. Every chance they have to use Oauth for authentication – there using it, OpenID is the default way to join up and get a account and they support everything from Twitter to Indeti.ca. The use of email to control everything is a little odd, but there is support for a API. I'm sure Instant messenger and other methods are not far behind. Most of you already know I favor pipeline interfaces for complex operations and until now I've been pining my hopes on Conduit which supports much more services but is really a syncing application rather that a Pipelining application. Anyway, I've only played with tarpipe for a few minutes, so I'll hopefully have more to say and show once I get going tomorrow.