OK, so this is what I got:
http://bit.ly/1O70tg7 - opencv ipk
http://bit.ly/1rAuvPa - test file ipk for opencv
This was built using the makefile from @Boken-Lin's original suggestion ( https://github.com/WRTnode/openwrt-packages/tree/master/libs/opencv ). I have yet to flash it and test it out, but I figured this being in here sooner rather than later would be good.
The next step, should npm be working, would be to get the nodejs opencv packages for opencv3.0 working, and then tying them into a web camera stream, right?