Single data point: My wife emailed and called them (apparently emailing didn't do much), and they are sending her the missing VGA connector/bracket, so that I can have back the DVI-to-VGA adapter I "stole" from MY card (a Radeon I bought to use in my computer but have not yet installed).
From thinking about the wide variety of experiences people have related here -- along with the experience WE have with the one we got -- I am of the opinion that there are more than one "flavor" of product (but same make/model) that the vendor shipped out.
Ours was sent from the New York warehouse, and, DOES qualify for the free Windows 7 upgrade. Further, it seemed to be a brand new unit (had all the "peel-off" protector junk on the plastic cabinet trim), but, was missing the VGA bits.
However, it DID operate via the native (motherboard) VGA port -- for about two days, until I went to optimize it (i.e., tweak the resolution/bright/contrast/gamma/etc via the Vista config panel). My changes DID "take" however when i rebooted the machine it came up black-screen -- not even the boot-time POST info displayed. That was when I decided to try using my DVI adapter, on the hunch that it had switched over to the video card (frankly I was surprised that the motherboard video worked in the first place -- generally on-board video is deactivated when a video card is installed, to avoid conflicts).
I get the impression that some people got new machines (i.e., factory overstock/left-over when the next model run came out) -- it's not unusual for such excess inventory to be liquidated, after things like monitors and standard warranty are removed -- and, I think other people got machines that were refurbed -- and, some people seem to have received classic yellow citrus products (either "oopsed" by being slipped into the "to-refurb" line but shipped before they were repaired, or... who knows).
Hopefully ALL buyers will be given some kind of satisfactory relief, without major delay.
(From my cursory look at the specs for the "alternate" machine, it looks like a fair deal, IF you can live with the form-factor -- it has greater expansion capability -- can take twice the RAM, and has more card sockets available -- and, with a quad-core CPU will probably be a significantly better performer for processor-intensive operations (video/photo processing and so forth). Raw CPU speed is less of a factor than core number for such work.)