MWSF
for mwsf, i think they will certainly release a new imac with 700-800mhz for low end, 800-900mhz for mid, and 1ghz g4 for high end. hard drive sizes will most likely stay the same except for the low end (30gb, mb?). the teo lower imacs will come with cdrw as standard. high end will come with combo standard and all three will have the option of upgrading to either combo or super. also, the low and mid range imacs will be targeted at education and consumers so i believe they will stay crt for the time being. i believe the high end imac will have a 15" lcd. apple didnt order many of these because they are fearing another cube. the lcd imac will be very expensive for an imac, while it will also be targeted at consumers (pro-sumers?). this is what happened with the cube and apple is keeping lcd imacs in short supply to ensure this doesnt happen again and to increase demand. ram will stay relatively the same.
ibook will have a very minor update; probably a small speed bump at least to 700mhz to keep up with everything else.
the tibook will have a larger speed bump (800mhz?), and a bigger hard drive if possible. maybe even a new video card if we're lucky =)
g4 towers with speeds up to 1.2ghz and the apollo chip will be released. the high end probably wont be available immediately (maybe 2-3 weeks later). small changes in configuration will probably also be present (like LOTS more standard ram, maybe 512 or something).
the g5 computer will be announced but will probably not be released for another 2 months. apple will do this to make sure people arent as pissed with this expo as they were at mwny. expect some KICKASS hardware standard on these puppies like 1.0-1.4ghz (1.6 only for the very optimistic) processors, 512mb ram all around >
~ maybe even a dual g5 for people who really want to break the bank!
a new server g4/g5 might also be announced. new enclosures and configurations for these servers are very likely. i havent heard anything about this on rumor sites recently but i think its a definate possibility (thing 2!). apple wanting to make it a g5 could be the reason that it was not released earlier.
at least one new apple-branded program will be released (iphoto anyone?). i dont expect any new itoys like ipod to be released at this expo. a new mouse may be released but i doubt a new keyboard will. the mouse is getting old but the keyboard is just fine for me =)
of course, these are just my speculation and are to be taken with a grain of salt =) heres hopin this expo is the biggest and best one yet! cheers!