IFC & attributes import-export

[paddyclown]

Quick question:

Where is Trimble at on expanding the capabilities of Sketchup vis à vis IFC & attribute import/export ?

For the moment, if I've understood correctly, one can label components & groups following the IFC classes... & when exported & opened in Bimsight or Eve or whatever we can see the class info.
However, unlike the biggies (Revit or Archicad or whatever) we can't yet add extra attributes like name (of an Ifc:Space object for example) or a cost or other enrichment & have it show up in an IFC viewer) ???
Apparently if we import an IFC file from one of the biggies we do get their extra attribute information... ?

So, has anyone any news, or info about a clever plugin that can add our own extra info to a correctly classified IFC object and have that info get exported with the "export3d>IFC" functionality ?

Thanks, & sorry if someone else has already done a thread on this, but I didn't find it !