Reports are merging that the developer's version of PSN has this morning come back online.
Eurogamer reports that the move could point to an imminent return for the main network.
"The internal PSN developer network is online again, at least it seems for some, although things are still a bit shaky at the moment such as lack of new account sign up," a forum user stated.
"Looks like the full network, at least the online play/account part of it, will be back soon."
After missing previous deadlines Sony is now refusing to date a return for the network. PSN was downed on April 20th.