Setting the Default Category Tag on the Create Site Page
In WSS V3, we added categories to the site definitions so that it would be easier to find the site template you're looking for. By default, the first tab is selected when the page loads. However, you can change the default tab by appending the query string parameter: DisplayCategory=CategoryName to make that category be the default.
For Example:
http://server/_layouts/newsbweb.aspx?DisplayCategory=Meetings
