Was just doing a little thinking, and remembered that there are 10 books planned of the main series, and also 10 orders of the Knights Radiant. As a result, I attempted to see if they lined up with one another, using the main flashback characters, from what we know so far.
Kaladin - Windrunner
Shallan - Lightweaver
Dalinar - Bondsmith
Eshonai - ???
Szeth - Skybreaker
Lift - Edgedancer
Jasnah - Elsecaller
Shalash - Lightweaver??
Taln - Stoneward
Renarin - Truthwatcher
The two missing orders from this are the Willshapers and Dustbringers, with Eshonai and Shalash wavering a bit. I know that Shalash is the patron of the order of the Lightweavers, but that made me think of something else. Is it possible that a Herald would bind to a KR spren of an order which they aren't the patron of? We know that Nale bonded to a highspren as well as having his Skybreaker honorblade.
We know that Eshonai's sister, Venli, is on her way to becoming a willshaper - so that could be the association of that order as well. Any thoughts? It seems to match up decently for most of them, but it could just be a co-incidence but our lord and savior Brandon likes his numbers and associations, so I'm not sure.