Ok, here is my prediction, just my guess.
WWDC:
-3.0 GHz PM
-eMac Upgrade
-Tiger Release (if not released earlier)
-iTunes 5
-New brushed metal themed Pro Keyboard + Mouse(with scroll whell + 4 buttons [maybe; with one button and four button options (because some people still like the one button)], bluetooth and corded but with rechargable batteries in the BT version, and a backlit keyboard, and maybe a lit mouse (i.e. Microsoft Stark)
MacWorld Boston (July 11-14):
-HD Powerbook w/dual-core G4 processor and faster Graphics and 2 Button Mouse
-New iPod Mini with color screen and bigger storage+better battery life (if not released earlier)
-2.5GHz xServes
MacWorld Paris:
-New 5th Gen iPod w/ color screen, 40GB storage but with 20GB size casing (if not released earlier [also I don't know if they would sacrifice iPod's signature white for the brushed metal theme])
-iMac G5 upgrade
-Something else
MacWorld 2006 San Francisco:
-Powerbook G5 (finally)
-Cheaper, new Apple Cinema Displays (if not released earlier)
Also, any clues on what the tiger user interface could look like (i.e. Aqua, brushed metal)
(with software updates [i.e. iWork] scattered within all of these events)
These are just my guesses; I am new to this forum, hey guys.