I'm doing some wiring in my house, and am wondering if I should use this opportunity to run some CAT-5 for the TiVos. I have an S2 and an S3, and plan to buy a 2nd S3/HD when MRV is activated for the HD units. My TiVos are already on a wireless network, but I am curious if MRV is faster over cable. If so, I will run the ethernet cables now, to be ready for "any day now" MRV. I am running new cabling for my cable signal; I have the older RG-59 (?) cable, and am upgrading to RG-6 or 4 or whatever is best for HD signals. I am also installing an antenna on our roof, and am running cabling for that also, to all of our TVs. I intend to use the ability of an S3 to simultaneously use a cable signal and an OTA signal. Plus I'm curious to see the difference between the uncompressed OTA HD of a major network versus the compressed signal of ComCast.