Multiple categories and new shortcode?

Hi, this might be an unusal question, but I have a special scenario to list events that I haven’t found any reliable plugin that can handle. Looking at your shortcode list, I don’t think (?) EO can either.

But, maybe you think implementing the necessery funcion and shortcode is worth while, so I state my scenario here.

Okay, what I need is a feed with 4 events from 4 different categories, where each is the latest in each category – all 4 sorted by date.

Example to clarify my scenario. If I had 4 categories with these event days in place:

Cat-1
Jun 20
Jun 25
Jul 2

Cat-2
Aug 3
Sep 17
Sep 28

Cat-3
Jun 17
Aug 7
Oct 16

Cat-4
Jul 3
Jul 6
Sep 12

My feed would be these four, the closest date from each cat:

Jun 17 (cat 3)
Jun 20 (cat 1)
Jul 3 (cat 4)
Aug 3 (cat 2)

—

A shortcode would be something like this (with the last one made up by me…, and assuming its possible to use multiple categories – and assuming these are sorted by event date):

[eo_events event_category="cat1" event_category="cat2" event_category="cat3" event_category="cat4" numberposts="4" numberposts_by_category="1]

What do you think?