I assume they will eventually open up a new land sale/auction to distribute the remaining lands, but I haven't heard anything about when that will be.
Meanwhile land trading is happening now in the Decentraland chat's #land_trading channel. I've also seen people running personal land auctions on Reddit. At the moment, prices are high for those, so you might do better to wait for the next official sale.
Thanks for the reply. I didn't know about the private auctions in the land trading channel. I will definitely be checking that out.
I am just learning about this as well. Can someone provide a link? Is this for slack?