One that I can't identify the new pattern is to do custom handlers.
In 2.1 I had this in my web.config:
<HandlerConfiguration defaultPageLocation="DTP_.aspx"
type="Subtext.Framework.UrlManager.HandlerConfiguration,
Subtext.Framework">
<HttpHandlers>
<HttpHandler pattern="(?:/about\.aspx)$" controls="about.ascx"/>
</HttpHandlers>
</HandlerConfiguration>
Where do I place that now? I'm not on IIS7.