There sure are a lot of choices for creating an online presence nowadays. I often try new places when I hear of them; I've tried Second Life, MySpace and MSN Live Spaces but dumped them.
This blog still my remains my main online website. However, you can also find me on Facebook and Flickr.
I've found Facebook quite a fun place to hang out. It hits a sweet spot between blogging, email, chat and photo sharing by providing a context for interacting with friends online. Clever. And it provides an open platform for simple applications that encourage interactions. Very clever. And it's a great place for creating casual groups. There's even a group for graduates of my old elementary school! Amazing how well Facebook is taking off.
I'll be using Facebook for posting pictures of family and friends.
I also have a pro account on Flickr I'm using to share photo's. I'll be using Flickr to post our travel photo's and other photo's of us. That's where the photo stream on my blog comes from. You can easily watch for new photo's without me having to make a blog post.
You can also sometimes catch me on Windows Live Messenger but I don't use it much.