The mojoPortal Welcome Message control can be configured to link to the logged-in user's profile. This is useful if you want to have a message like "Signed In As: USER NAME" and have USER NAME link to the user's profile settings.
Here's the code for it:
<portal:WelcomeMessage id="WelcomeMessage" runat="server"
CssClass="greetinglink"
RenderAsListItem="true"
OverrideFormat="Welcome, <a id='lnkMyAccount' href='/Secure/UserProfile.aspx' title='Manage your User Account'>{0}</a>" />
The {0}
is where the user name will be placed.
And that's that. Happy mojo-ing!