TiVo announces TiVo Mega, a rackmount DVR with six tuners and 24TB
The new TiVo can record up to 4,000 hours of HD or 26,000 hours of SD. Price hasn't been set, but they're estimating it to be around $5,000.
It sounds like a lot, but as a comparison my setup with 4 tuners and 5.4TB of storage cost $3084. Granted I have gone a little overboard