Found both of these on Phil Bradley’s blog.

first is http://www.addtoany.com/ which can produce a button like this, which will link to a page with every kind of “add to [rss reader]” button you will ever need.

Secondly, badged.net allows you to “add your favourite social networking badges to your blog or web site”. I can’t seem to paste the code in to a post, wordpress seems to remove the {script} code (probably with good reason).
Will have to add these to my template at some point