It has recently been announced that Microsoft and Google are launching a scheme that will allow people to use one name and one password to log onto different web sites.
Yahoo and AOL are also backers of such a scheme.
No! No! No! No! No!
NOT IN A MILLION YEARS WILL I EVER SUBSCRIBE TO SUCH A SCHEME.
Every web site that I subscribe to has a unique and a random characters password of at least 12 characters, although my user name and sometimes my email address is the same almost everywhere. I use a different email address for really important web sites like bank or on-line payment processors like Liberty Reserve or E-Gold. And they get at least a 15 random characters password.
To put all that into just one user name and one password would be foolhardy.