With it being so close to WWDC and still not even any rumors about the new ibooks I have come to the conclusion that it must be either, that there really is going to be no update, or a very very minimal update to the line at WWDC or even the expo, however more likely there is going to be a major upgrade as in maybe a form factor change, cpu speed bumps, fsb speed bumps, a 64mb vram core image capable card, higher resolution screen, bigger hd, 512mb of ram on the motherboard, BTO option of superdrive among other possible changes. And the silence is due to the fact that this new ibook is going to cut into the 12 inch powerbook(who would buy the powerbook when the ibook is going to have almost as many features for around $500 less) market thus apple wants to sell as many as they can before than.
Hopefully thats it and we get some nice new ibooks at WWDC because I really want one. 🙂