Glad to hear that templates will be eventually included. I'd definitely make the recommendation that support for "mailing labels" (or any label for that matter) is included. I ran across an old help page for Crystal Reports for .NET and noticed that even it supported "Standard Reports" and "Mailing Labels".
As for other templates, it would be nice to see templates that pre-allocate space for placing a summary chart on detail report (I guess I am assuming that Telerik Reporting will include support for charting in reports). Beyond that, just some nice "skins" or layout templates would be nice.