How to set style for multiple and/or nested tags?

[Rob Freundlich 146]

I'm really interested in the new tag style feature, and I'd like to make use of it.  I use a lot of tag hierarchies, and so what I'd like to do is to assign the same style to a given tag and all of its children.  For example, I'd like to make my financial tag and its children financial.receipt, financial.bill, and so on green.  However, when I multi-select them and set a style, only the tag that I actually right-click on gets the selected style.

If the parent only has a couple of children, that's not a problem - I can single-select each and set them individually.  But when the parent has a lot of children, that's a pain.

Anyone figure out a way yet to assign a style to multiple tags at once?