While creating MySite today, i encountered the following error,

HTTP/1.1 404
Connection: close
Date; Tue, 16 Sep 2008 05:04:43 GMT
Server: Microsoft-IIS/6.0
MicrosoftSharepointTeamServices: 12.0.0.6219
X-Powered-By: ASP.NET

This error occurs because the SharedService is not properly configured. You can resolve this error by correcting the SharedService or by creating a new SharedService for this site from Central Admin.

I just created a new SharedService from the Central Admin and associated this site with that SharedService and MySite was created