I am guessing that we will get an announcement on April 30 at the latest. Apple's Q2 earning were listed as being released on April 25 on one site but now nearly all show May 2 as the earning call date. Apple is not going to want to have the call without an iPad announcement before. Q1 earning for iPad were already down 25% and with no new releases I imagine Q2 is going to be even worse. Since Apple never comments on unreleased products on the call it would be super awkward to have the call with blockbuster drops in iPad sales the last two quarters and no new product announced to address.