Yeah totally a important thing to have access to for sites with rather complicated data relationships. (Well, 3 levels isn't that complicated really!). I know Smarty pumps out a large series of arrays that are accessable anywhere simply by calling $firstLevel['value'], $secondLevel['value'] etc.
I'll keep an eye on the changelogs. If you remember, it'd be cool to post any further developments on this here, as this limitation will be a pretty important factor in choosing SS for complicated client requirements for us. I still don't really understand the context of Ingo's work-around.
Cheers
Aaron