I'm curious as to what the "ATI Radeon HD 4850" optioned card actually is. As many of you know, Apple is notorious for mislabeling the graphics cards in the iMac line. i.e. the infamous Apple-labelled HD 2600 Pro was actually an underclocked MOBILITY Radeon 2600 XT. I'm a bit worried that the Radeon HD 4850 option is actually a Mobility Radeon HD 4850, which would be extremely bad news, as the mobility version of that card has significantly less power than its non-mobility counterpart. Anybody have any info regarding this? I'll update as info become available. EDIT - Short update 3/6/09: been getting conflicting reports about the HD 4850. According to posters, some Apple reps are saying it IS the mobility variant, while others are saying that "It is not the mobility version. This is the full graphics processor." In any case, to those who are wondering, even if the 4850 -is- the mobility version, it is still significantly faster/more powerful than the GT 130. Will keep updated.