Link to Home on Top Navigation Bar
By Anatoly Mironov
If you have a custom site definition and want to have a link to RootWeb, just add NavBarPage to your module:
<Module Name="OrklaRootBlank" Url="" Path="">
<File Url="default.aspx">
<NavBarPage Name="$Resources:core,nav\_Home;"
Url="~site" ID="1002" Position="Start" />
</File>
</Module>