My B&M had both 2Meg and 8Meg buffers in stock, and they both rang up at $109.99, even though they had different UPCs and different SKUs. They also had a different type of ID label on the bottom of the box. They "checked" and told me that while the 8Meg buffer rang up at the same price as did the 2Meg, the rebates did not apply to the 8Meg version.
I am undecided about believing them. The first guy I spoke to was clearly clue impaired, but the guy who took over from him seemed to have bought a vowel or two, and at least spoke authoritatively.
On the other hand, the WD $30 rebate I printed out online says buy any WD 80Gig drive and get the rebate, while the OM $20 rebate says buy a 80G drive and get a $20 rebate. That latter rebate strikes me as being at least a little more ambiguous than the former. For now, I am inclined to wait for delivery of the backordered box on the 14t, and thereby insure I get both rebates and take the chance on getting the bigger buffer. No doubt yet another drive deal will surface in the interim, and that might make this deal moot. I'd prefer the fluid bearing Maxtor in any case; it seems due for another deal in the 80G size.