With the Office 2.0 conference coming up this week, I thought this error message from Yahoo Mail provided an apt example of one of the key issues related to cloud computing. Sometimes the connection gets lost. That's not to say that an on premises mail server can't go down, but my expections are for no unannounced down time. Right now I have 13 new messages in my Yahoo Mail that I cannot access. I keep hitting reload and get the same Error #1 message--so far about 30 minutes of inaccessible mail. If you can't count on one service provider, the switching costs are low. And, I will not encourage key contacts to send emails to multiple mailbox accounts. Although I have been using Yahoo Mail for as long as its been in existence, if Yahoo can't keep its servers up, I will switch to my Gmail account. In the cloud of Office 2.0, quality of service will increasing be a factor in who gets the users' loyalty. Oh, and Yahoo Mail is finally back up.