I am assuming esri's FeatureDataForm can be templated similar to the standard silverlight dataform. Is this correct?
Sure. The easiest way is to use Blend : create a featuredataform, right-click, edit template, edit a copy, .... If you don't own Blend, I give you the default template:
<Style x:Key="FeatureDataFormStyle1" TargetType="esri:FeatureDataForm">
<Setter Property="Background">
<Setter.Value>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFF3F7FA" Offset="0"/>
<GradientStop Color="#FFFFFFFF" Offset="0.1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="BorderBrush">
<Setter.Value>
<LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFA3AEB9" Offset="0"/>
<GradientStop Color="#FF8399A9" Offset="0.375"/>
<GradientStop Color="#FF718597" Offset="0.375"/>
<GradientStop Color="#FF617584" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="esri:FeatureDataForm">
<Border x:Name="DataFormBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="2">
<Border.Resources>
<Style x:Key="CustomScrollViewerStyle" TargetType="ScrollViewer">
<Setter Property="BorderThickness" Value="0,1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ScrollViewer">
<Grid>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Margin="0,-1" Opacity="0.2" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}">
<Border.OpacityMask>
<LinearGradientBrush EndPoint="1.07,0.5" StartPoint="-0.07,0.5">
<GradientStop Color="#FF000000"/>
<GradientStop Color="#7FFFFFFF" Offset="0.5"/>
<GradientStop Color="#FF000000" Offset="1"/>
</LinearGradientBrush>
</Border.OpacityMask>
</Border>
<Grid Background="{TemplateBinding Background}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<ScrollContentPresenter x:Name="ScrollContentPresenter" Cursor="{TemplateBinding Cursor}" ContentTemplate="{TemplateBinding ContentTemplate}" Margin="{TemplateBinding Padding}"/>
<Rectangle Grid.Column="1" Fill="#FFE9EEF4" Grid.Row="1"/>
<ScrollBar x:Name="VerticalScrollBar" Grid.Column="1" IsTabStop="False" Maximum="{TemplateBinding ScrollableHeight}" Margin="0,-1" Minimum="0" Orientation="Vertical" Grid.Row="0" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{TemplateBinding VerticalOffset}" ViewportSize="{TemplateBinding ViewportHeight}" Width="18"/>
<ScrollBar x:Name="HorizontalScrollBar" Grid.Column="0" Height="18" IsTabStop="False" Maximum="{TemplateBinding ScrollableWidth}" Margin="-1,0,-1,-1" Minimum="0" Orientation="Horizontal" Grid.Row="1" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{TemplateBinding HorizontalOffset}" ViewportSize="{TemplateBinding ViewportWidth}"/>
</Grid>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Border.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<ScrollViewer Background="{x:Null}" IsTabStop="False" Padding="{TemplateBinding Padding}" Style="{StaticResource CustomScrollViewerStyle}" VerticalScrollBarVisibility="Auto">
<ContentPresenter x:Name="ContentPresenter" Margin="12,12,6,12"/>
</ScrollViewer>
<Grid Margin="0,8,0,8" Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button x:Name="CommitButton" Content="{TemplateBinding CommitButtonContent}" Grid.Column="1" HorizontalAlignment="Right" HorizontalContentAlignment="Center" Margin="0,0,12,0" MinWidth="75" MinHeight="22" Style="{TemplateBinding CommitButtonStyle}" Visibility="Collapsed" VerticalAlignment="Center" VerticalContentAlignment="Center"/>
</Grid>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
