Tim has been playing around with Digg a bit, and I have seen interviews he has done with the CEO Kevin Rose.
For him, posting at 7AM PST and 6PM EST tend to work well (for Digg).
And he suggesting posting on Friday night. That worked for him anyway, your audience may or may not work well with these times.
A small, but powerful tweak for you blog is to change the word ‘category’ to ‘topics’ since Tim Ferriss found this dramatically improved clicks.
He also has been putting ‘most popular’ posts in the upper right. He hired someone to write some code to update these automatically.
Tim uses the stats program within wordpress- since then you can see what phrases people are looking for on your site and possibly keep that in mind when you write future posts.
He leaves his twitter feed lower down on the blog page though. You want people to stay on your site for a while, not immediately go off to twitter (or youtube).
