This group is focused on Beam coin, a new privacy-focused cryptocurrency.
Beam is an implementation of the Mimblewimble proposal. Mimblewimble was proposed anonymously in 2016 and has since been thoroughly vetted by academics and cryptographers, but has still not been implemented in a functioning digital currency. Beam will be the first usable Mimblewimble coin, with a test net scheduled to launch Sept 1, and the mainnet Dec 1.
Whereas the sender, receiver, and amount of any Bitcoin transaction can be seen publicly, Mimblewimble hides all this information, and is named after a Harry Potter spell that stops people spilling secrets.