Two separate reports came in today on upcoming consumer Macs.
French site MacForever says the new iMacs will have SD card slot(s) and Quad core processors. Interestingly, Quad-core Intel i7s were released this week which are the fastest mobile processors money can buy. iMacs traditionally have had mobile processor chips (except the G5 edition) so this wouldn't be a stretch. MacForever even speculates that the high end iMac may contain a Xeon processor, something that until now was reserved for Mac Pros and XServes.