DATE RANGE was added (Sept. 2011). When Using the Calendar Extender, you can specify startDate and endDate, and the user can pick a date within that range.
TWITTER control
<asp:Twitter ID="Twitter1" runat="server" Mode="Profile" ScreenName="MyTwitterName"/>
GRAVATAR
<ajaxToolkit:Gravatar runat="server"
Email="myEmail@myEmail.com"
Size="200"
Rating="R"
DefaultImageBehavior="Identicon"
DefaultImage="PathToMyImage" />
