Defaults to term

Thanks for an essential module... but of course I have a request :-)

I'm using the Taxonomy Access Control module to limit access to particular vocabs/terms based on roles.

So when a particular user is logged in, they can only create content in one 'section' and one 'category'. This works OK with the default content types - the category select defaults to their only available option - no selection is needed.

But with CCK/this module, the select defaults to no selection "---".

Could an option be included for defaulting to a term if only one is available?