Last I heard it was nearing 50/50. Depends on where you get your info from. Many broadband companies IMHO tend to "fudge" the number a bit to solicit those who haven't upgraded.
I would suggest you keep designing for 56k if that is why you're asking.
also depends where you are / where your customers are - OK so the average dialup v. BB may be 50/50 in USA, it's different in Europe. Go to Tokyo, get a 100MBPS cable connection.
