I'm creating a little website to help coordinate a much-loved lecturer's retirement event, and want to add a social web "sharing" button to it. I note that EduGeek uses AddThis to provide the little bookmark button at the top of threads, but I've also been looking at ShareThis which looks like it goes one further than AddThis by including posting the content to blogs such as LiveJournal, and has an email form.

Does anyone have experience of using ShareThis or could offer any recommendation of using one vs the other?