The downloads at https://primecoin.io/downloads.php still work.

It looks like Sunny started another coin at some point and attracted some kind of harassment or hostility on social media so he stepped back.

The wallets work and there are plenty of nodes.

A person can go to the network tab at https://chainz.cryptoid.info/xpm/#!network and get node lists then open the wallet console to add nodes, but it shouldn't be necessary since the wallet catches nodes on its own