According to Gamasutra, Sony has informed developer partners that the PlayStation Store will return on the 24th of May.
“The company has sent a tentative publishing schedule to partners detailing when their games, expansions and other releases will become available to players,” says the site. “In the memo, obtained by Gamasutra, Sony unveils plans to do two content pushes per week for the next two weeks to catch up with the backlog of content.”
There appears to be a series of ‘pushes’ to get stuff live. Gamasutra says the first (on the 24th) will be the content that was meant to go live April 26. There’ll be another three days later, and then another two the following week.
There’s more here, including mention of options to move some elements of the updates around.