The Slicoin team notified the community on Monday 6/21 with the chia phase(testnet 1) launch date of Friday 3/22.

From Slicoin Team:
With the chia net launch we forked the code from chia network but the weight proof fixes require a new chain to test. Additionally, some users on MacOS are having issues plotting from the GUI that we would really prefer to resolve before 1.0 is out. Those users can plot from the CLI fine however.