I have a nice web-app coming together, but I'm having trouble getting a place name title to pop up by features. I took the constructed page apart and this is what it looks like:

OL generates a div with an id like
OpenLayers.Layer.Vector_###
where ### is at least a two digit integer.
The div is positioned absolutely (top/left: 0) but has no width or height.

Inside this div is an svg node with an id like
OpenLayers.Layer.Vector_###_svgRoot
This node has width and height measurements which matches the size of the map.

Inside this is an svg group node with an id like
OpenLayers.Layer.Vector_###_root
which has another group in it, which has an id like
OpenLayers.Layer.Vector_###_vRoot

This group contains svg nodes with ids like
OpenLayers.Geometry.Point_###
and cx/cy offsets which are relative to the top left of the map

The actual shape representing the feature appears to be in a defs element with an id like
OpenLayers.Layer.Vector_###-shapename
where shapename is one of the OL shapes (triangle, square, star etc.)