When we got our new Comcast HD/DVR box, we opted to keep the old digital cable box (yes, we like tithing more money to our cable provider :/). The main reason - we wanted the Replay TV to continue recording the (large volume of) non-HD content that comes through the old digital box, while having the (really lame) Comcast DVR record the HD stuff.

That was a fine plan, except that the IR blaster cable broke - that's the cable you hook into the Replay so that IR signals sent to it can be routed through to the cable box. Turns out, a replacement was a mere $6.95 plus shipping away. It just arrived, and it works great! Back to too much TV to ever be able to watch nirvana :)