Even if this was a top priority, I believe we'll have to wait until Alexa Voice Service (AVS) is available from Amazon, which is still in "coming soon" status:
developer.amazon.com/appsandser ... ce-service
There are existing hacks to use Roomie with existing voice features using Alexa Skills Kit (ASK). Youtube has a number of examples using TODO functionality to trigger roomie tasks if you'd like to having something to play with sooner rather than later.
Just got an Echo in today, and I'm unsure, but it might be possible to get ASK to trigger IFTTT events back to Roomie Agent, if you're already running that. The folks hacking things with TODO are (I'm speculating) most likely running their own proxy in a similar fashion.
Just signed up for an AWS account for the same email that I use for Echo. Will post updates to this thread if I have any luck beyond what's being tried currently, though given that early-adopters haven't had much luck beyond that, my expectations are tempered.