straight from apple's secret lab:
1) mac minis give slight boost, not much though
2) ibooks are going to retain the same form factor, but will be given slightly better specs (just a speed boost though)
3) powerbooks will be available in 1.75GHz Single Core for the 13.3 inch powerbook that will be released. 1.75 GHz DUal Core for low end fifteen inch. 2.0GHz for high end 15 inch and 17 inch. oh yeah, and high def screens in the 15 and 17 inch models. all with 512 mb ddr2 ram standard, perhaps wireless firewire.
new chassis for the powerbooks (more and better speakers, backlit keyboard in all models, improved battery life too). and all notebooks (ibooks included) will have a new mouse button that can be set to one-click (like it is now) and can be changed to dual-click (one mouse button but with dual-clicking capabilities, activated by a switch or a magnet or something).
new software, blah blah blah, e700 64-Bit notebooks by MWSF 2007 running at 3.0 GHz at least, all dual core. 4.0 GHz powermacs by MWSF 2007.
some time after this event, jobs will announce that the eMac will be discontinued in 2006 and will be replaced by an upgraded mac mini with the option of a keyboard, mouse, and 17 inch apple display that will be the first to use OLED technology.
and all products with wireless firewire, and you will be able to buy those new wireless charging pads for the notebooks and for the mac mini, possibly. next imac update will have high definition screens. apple will announce HD-DVD and Blue-Ray compatibility in all notebooks soon. wireless USB 2.0 soon too. all color screen ipods, including low end ipod and minis. shuffles will be redesigned with an OLED screen under the glossy white case, so you will be able to see what you are playing through the screen (sort of like what Sony recently released).
this is all i can think of, i think there's a good chance of me getting at least ONE thing right