I'd like to modify the RSS feed so that feed items include a Digg and a StumbleUpon link. But while my HTML/CSS skills are passable (was able to add the links to my Entry template), I'm lost when it comes to editing the Atom template (or even if that's where I need to be).

Any hints to get started? Ideally I'd like the following type of look.

Post Title
by Cook Local
Digg | Stumble Upon

Entry text
Entry text
Entry text

OR

Post Title
by Cook Local

Entry text
Entry text
Entry text

Digg | Stumble Upon

What I do is use http://www.feedburner.com/fb/a/home it allows me to customise my feeds and add social links etc.

Feed Flare under optimize allows you to add digg, stumble, facebook, email