alright i've got some more speculation.
think in september apple is going to do a complete refresh of the ipod touch line, meaning previous models will only be available through the refurbished store, ebay, etc.
they're going to include facetime cameras on all of these redesigned models, as well as adding facetime functionality into ichat. I don't see why you are all doubting that apple will add this.. apple isn't selling 10 million iphones this year.. i don't think. all models will be the same thickness as the iphone, with the same design scheme & possibly more colors. first there will be the ipod touch, and then also the ipod touch mini. the touch mini being the same width as the ipod touch, yet it will have a square design. price points for the ipod touch 8/16/32/64 will be 199/299/399/449 and $50 less for each of the mini models. i'm not sure how apps will work on the ipod touch mini.. however it will differentiate quite a bit from the full sized model in battery and size, giving it it's own product base. due to the fact that the current ipod touches are so thin, making them the thickness of the current iphone will allow apple to add features such as sd slots (only a single slot in the touch mini), rear cameras, 3g, etc.
apple will add built in sd functionality into their mobile device line eventually. they've obviously accepted it, as they have added it in 90% of their recent product revisions. the only question is if it will be with the ipod touch 4 or if they wait until the next iphone revision. which is very likely. apple is currently stepping their game up a bit, but i think unless they really want to blow peoples minds with the new ipod touch; (which they're totally capable of doing, and will hopefully be pushed to do due to all the recent heat they've been getting), then they'll probably hold out & make sd available across the entire next (5th) generation of touch devices. this time around it'll probably just be facetime, new design, a4,retina, optional 3g and maybe 5mp back camera across the board.
and what's with everyone trying to say what the ipod touch is about? it's obviously about a **** ton of things other than just music & media, or jsut fun and games. obviously apple wants these devices to slowly evolve into our handheld computers & communication devices that also film and edit HD and take pictures & play games and so DO YOU GET THE PICTURE? a handheld communication device doesn't NEED to be a phone. and that's what apple needs to realize and/or show people. apple creates the future of handheld media devices & will continue to improve. . albeit slowly, quite surely. thus facetime will be included, added to ichat, that way damn near anyone with an apple laptop or new gen touch device will able to utilize this new feature.