Patrick Seybold, Senior PR Manager for SCEA, has replied to a comment on the latest post on the PlayStation.Blog with some information on when we can expect the next firmware update. He states that "early next week, we'll have something on the firmware." We have also heard that a member of the Sony customer support staff has let on that the 1.90 update will be happening on Tuesday the 24th of July.
We have no idea exactly what the update will bring, but we're hoping that it'll be something substantial. Gamer's Creed has a list of suspected features that are due to be added, however this is all currently just speculation. One of the features listed is "XMB is now accessible during gameplay." If this is the case, we might actually explode with excitement. We'll keep you updated with any developments.
[Via Gamer's Creed]