run Echo and SmartThings in parallel, both talking to the same Hue Bridge. Works very well, but you only have Echo control of those bulbs.
do 1) above but also use the Big Switch for Hello Home Actions (a smartapp) to give you voice control of Hello Home Phrases. Works ok, sometimes lags.
wait for official integration, which several people are working on and could be out by the fall
if you’re comfortable with ruby, Python, etc and setting up your own server you can create your own extensive integration. See the technical interface topic.