As you adopt the Web 2.0 approach to marketing your business (or just having fun) you may end up with a couple of blogs, a photo-sharing site, a Facebook/Linkedin profile, maybe some micro-blogging. Fortunately you don't have to send a friend half a dozen URLS to these pages.
There's a growing number of sites that bring together - 'aggregate' - your social networks. I'm evaluating several: Swurl.com but there are several others around, such as Lifestream, Tumblr, etc. There's also Friendfeed.com.
They all allow you to plug in all your social networks, and they bring them together in one conveneint URL you can give out.