At the behest of electroman, I have installed Sociable, a WordPress plugin that adds sharing options to each post. You should now see below each post a little icon allowing you to share each item by email, over Twitter, and on Facebook. I’ve also included del.icio.us and StumbleUpon, which I think are fairly popular services.
However, please let me know if you want to add sharing to another social networking site or service, such as Mixx or MySpace. I’m happy to add those functions if they are also being used by you guys. Sociable has a long list of services it supports, which can be checked on its website.