I believe the MIR is for the CRT (tube) true-flat monitors, not for the flat-panel monitors. Staples have Philips 107T flat-screen for $299, so my guess is that the rebate will be for that monitor. The manager showed me the rebate form, but very briefly and I didn't catch the model number.
Edit: I saw the LA Times flyers, the only $100 rebate is for an LCD monitor, so TurtleMan is probably right.