If This Then That
The only downside is that you can't connect anything directly to Blogger or Yahoo Groups, but you can use RSS feeds, which helps somewhat. SO, I am now testing this website out! We'll see if this blog post will go automatically to my Twitter & Facebook accounts.
Update: My blog reposted perfectly to Twitter & Linked in, but not to my Facebook page. I emailed their tech support and got a prompt response, so we'll see if it's something I did wrong or if it's an issue on their end...
If you know of any other sites that can do similar things, I'd love to hear about them!