I think it was a 'toggleButton' in 2007, but in 2010 it's a 'control'
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui" onLoad="RibbonControl.OnRibbonLoad" >
<ribbon>
<tabs>
<tab id="RGHomeTab" label="RG Home">
<group id="ToggleTest" label="Test">
<toggleButton id="customButton7" image="CuteBall-Games" size="large"
onAction="RibbonControl.ToggleonAction"
getPressed="RibbonControl.buttonPressed"
getLabel = "RibbonControl.buttonLabel"/>
</group>
</tab>
<tab id="MixedTab" label="Mixed">
<group id="MyOwnClipboard" label="Clipboard">
<buttonGroup id="CutCopyPaste">
<button idMso="Cut" enabled="true" showLabel="false"/>
<button idMso="Copy" enabled="true" showLabel="false"/>
<control idMso="FormatPainter" enabled="true"/>
<splitButton idMso="PasteMenu" enabled="true" showLabel="false"/>
</buttonGroup>
</group>
</tab>
</tabs>
</ribbon>
</customUI>
Attached is a 2010 cheat sheet of ID's