Yes, as long as you buy the Series3 or TiVoHD from a retailer, not from tivo.com, it is eligible for the MSD pricing.rlcarr said:
If you plan to keep the current unit active, there may not be a lot of value to transferring lifetime service unless you're concerned the unit may fail and you won't want to pay an authorized service center to repair it.
You can get the S3 for about $340 using a AAA 10% discount coupon at Circuit City, after the $200 rebate. That makes it closer to $90-$100 more than a TiVoHD. For that you get a 50% larger hard drive, a better remote control, an included HDMI cable and the OLED front panel display of the S3.