The DevConf.us submission is closing 3 April - please make sure to submit your proposals if you intend to participate. The best way to promote Atomic is to give talks and engage with the community - all of you have something to say about Atomic and containers one way or the other.
Be that through explaining how pet containers work, maybe you've solved a specific problem or failed to solve one. Failure stories make great talks at conferences.
Atomic Workstation is a hot topic - if you want to take that on, perfect.
If you need more inspiration or would like to submit but have never submitted a CfP, let me know - I can give you some pointers and help you with ideas as well as the CfP itself.
Cheers,
Sanja