MacBook and MacBook Pro (August/September): Redesign with Montevina, speed bump (no quad-core), aluminum case, possible SSD, just like the rumors.
iPods (September/October): The regular capacity bumps, iPod nano coming in multiple colors, iPod classic price drop.
"iWrite" (September/October/MWSF): 5.5", 720*480 display, basically an enhanced iPod touch, $500~$700.
OR
MacBook touch (September/October/MWSF): 13.3", Mac OS X with multitouch ($2000+).
Mac Pro (~ January): Gainestown Nehalem, 3 GB RAM.
iMac (H1 2009): Montevina refresh, possible 1333 MHz FSB, possible quad-core.
iPhone (H1 2009): 32 GB version.
Apple tv (MWSF?): Atom instead of Pentium M. Possible price drops and/or HD bumps.
Mac mini (?): Penryn (not Montevina), 1067 MHz FSB is likely if the update is sooner rather than later, fairly big spec bump.
Cinema Displays (?): Apple may be waiting for either/both higher resolution (40" 3840*2400, 26.7" 2560*1600, 20" 1920*1200) or/and LED backlights.
iPod socks (?): Multicolored to match the iPod nano.