I wouldn't go so far as to call it a Digg clone, but even if you did, a Digg clone for tutorials and the like is a good idea.
In addition to submitting links, registered users can post tutorials and the like directly on Tweako. All the submitted content can be tagged, commented on and voted for by other users.
Registering at Tweako is free and creating the account lets you set up a profile that can track your voting and submission history. There are also tools for sending private messages and initiating a chats with fellow users in you "buddy" list. In addition to a site-wide feed there are also topic and user based RSS feeds.
The site is broken into fourteen broad categories ranging from tips for Mac or Windows users to Rails tutorials. And for something that just went public there's a decent amount of content on the site.