Not that anyone will notice, but I've removed Twitter from the sidebar.
The problem with social networking services like Twitter is they aren't very useful if you're not very social. I'm not a hermit, but my circle of friends and family isn't very big, and most of that small group aren't interested in online community. If my friends aren't all using it, its not much fun.
Replacing Twitter is "Talk To Me" - an interface to the Meebo service which lets you IM me directly from the blog. Do you have a question, comment or suggestion? Do you just want to say hello? Well, what are you waiting for? Talk to me!