When are WPMUDev responsive themes expected?

When are WPMUDev responsive themes expected? I know I have seen this mentioned in the community pages, just wondered if there’s a target date yet.

Non responsive themes are pretty much useless these days. More than 50% of all web page requests are now originated from hand held devices. Savvy customers won’t accept anything less than a perfectly responsive web site.

Cheers

Chris J