Old post, but I am wondering the same thing.. it seems like the hub saves over 200 recent events so the data is there.
It'd be nice if the MakerAPI /events API could take a few optional params.. by default it could do the same thing as today (last 20) but it'd be nice to add some kind of 'limit' param for the total number returned and/or be able to just return values for a specific attribute (ie: &key=contact)
I've been asked about this in my app - it sounds like maybe smartthings could show more here
