PS3 Firmware 2.4 - the one we're all waiting for - will be out on June 18, claim "unnamed sources" in Holland.
Version 2.4 is expected to introduce the much-requested in-game communication features to the console, as well as an Achievement-point equivalent Trophy system and other goodies.
"Summer" is the only official word Sony has given on 2.4's arrival, with June heavily tipped. The June 18 report from Dutch site PlayStation Only claims previous rumours of a June 10 release are false.
It's all speculation until Sony gives the official word, which we expect will be any time now.