For those of us who have severe data caps, but have "free time" during off-peak hours, having the ability to add recordings to the queue and delay the downloads until "off-peak" hours (such as midnight to 5:00 am) would be AWESOME. This option would also be advantageous for households with several users on a network, as it would not bog down bandwidth during the day.
There were several mentions of this on the forum, with some people choosing not to purchase PlayLater due to this feature not being available. Your product has a LOT of potential - adding an option to have items in the queue record during off-peak hours would be a MAJOR plus for those of us who have limited internet and this option would without a doubt increase your customer base!