>> BTW: Is it really a good decision to propertize the text algorithmically
>> in the functions building the agenda?  I'm not sure, but it might be
>> easier to define some `org-agenda-font-lock-keywords' like it's done for
>> org files, too.
>
> That is a good question.  I do, however, not believe that it would
> be easy to define font lock keywords which can handle the agenda.
> For example, when an item changes state, its face is changed, to
> something with depends on where the item comes from and, for example,
> how close the deadline is.  And more stuff like that.
> So font-lock regexp matching is now enough here.
> Yes, it would be enough for tags, but not for other stuff.

I see.

Bye,
Tassilo