Hey wetwilly 
It’s not too difficult, on each post we do this:
<a href="http://digg.com/submit?phase=2&url=<?php the_permalink() ?>&title=<?php the_title(); ?>" class="mylink">Digg</a> /
<a href="http://del.icio.us/post?url=<?php the_permalink() ?>&title=<?php the_title(); ?>" class="mylink">Del.icio.us</a> /
<a href="http://www.stumbleupon.com/submit?url=<?php the_permalink() ?>&title=<?php the_title(); ?>" class="mylink">Stumble</a> /
<a href="http://reddit.com/submit?url=<?php the_permalink() ?>&title=<?php the_title(); ?>">Reddit</a> /
<a href="http://www.designfloat.com/submit.php?url=<?php the_permalink() ?>&title=<?php the_title(); ?>">Float!</a>
Each service offers a URL for submitting to, so it’s just a case of filling in the URL fields with the title & permalink. I htink you can actually fill out even more details – e.g. the description and category of submission, but I’ve never got around to doing that.
(Sorry about the big lump of code by the way, these forums are not so good for code snippets)
collis is an Envato staff member