community chat is still on skype we will shift to slack most likely next year too
but for now we to busy to change already well established and good runing skype community
at the m,oment just some project related communication is based on slack
We have our own dmdcoin.slack.com channel but the core team doesn't use it that much.
I can see benefits of it, not only it's less buggy and less laggy but it's the only chat thing that's not blocked by my employers at work and even free version is good enough.
You can PM me your emails for invites so we could start using it.