Discovered this today. http://ilist.com/
It's a place that can combine all your social networks in one place and promote/advertise your services or other info professionally.
By linking to your networks, such as Facebook, Twitter, MySpace, Gmail, Yahoomail, Friendfeed and Windows Live Hotmail, you can promote your listing across your linked networks whenever you post a listing. When your friend sees your listing, they too can promote your listing through their network!
http://ilist.com/tour
I'm losing count of places where I've registered, joined lists, etc., to link back to my eBid stores