Mr Sylvain said that exporters for 8.5 and 2008 will be availible in next update. I'm sure that means soon.
How soon, that is the question...

I'm getting by OK with the PolyTrans DirectX exporter, but I'd
love to see a Maya 2008 TVA exporter.
On a side note, will
TVActor.ExportAnimations and
TVActor.SaveTVA be fixed in the next update, as well?