I am actually pretty upset because I bought my mac last month! My sister is upset about it as she bought hers at the same time. We were thinking they should have announced on their site at least 6 months ahead of time about the new ones coming out. Even if they didn't give specifics they could have said "coming in Oct, a new imac" something like that.
If it were even 6 months ago when I purchased mine I wouldn't be nearly as put off. It took a very long time of saving for me to get this one and knowing that a month later I could get SO much more, i.e. upgrade memory for $200 instead of $900 for 4 megs! Basically I would have paid the same $2,300 for twice the memory, 3" larger and brighter screen, MUCH better video card, sd card input, Quad Core and awesome mouse!

GRRRRRR
So yeah, NOT happy with Mac at all right now for not giving a heads up to people like me who saved for months and months to get a computer that will be outdated in a month!