Hi Pond Fish,
Currently we do not have a control that you can use out of the box. You need to develop a custom one. Generally you can create a ContentView based control or control that derives from SimpleControl - this will allow you to use methods like GetContent where you can filter and sort the list. Thus, you can easily show a list of items in a repeater. You can limit the number of the items shows. Then you can set some filter expression for the items created within a month.
|ContentFilterBuilder filterBuilder = new ContentFilterBuilder(this);
| filterBuilder.AddFilter(new ContentFilterStatement("Publication_Date", DateTime.Now.AddMonths(-1).ToShortDateString(), ContentFilter.Condition.GreaterOrEqual));
next to the title of each Webinar you can add subscription link.
the Telerik team