Thanks for your feedback!
We recently removed the ability to schedule replies because this functionality was getting low usage. Please continue to share your comments and vote on this idea if this is important to you!
Paige @Hootsuite_Help - http://hootsuite.com/help
One of the things I used to find most useful about hootsuite was the ability to pre-schedule replies. I used this feature because my department has a policy about communicating within 24 hours but only during the hours of 7am-8:30 pm. I would also use this feature to follow up with our clients a week later in order to make sure that they have had an improved experience. Hootsuite updated recently and I have lost the ability to preschedule a reply.
Now the only things I can preschedule are new tweets. This does not allow us to build upon an existing conversation and makes it difficult to track if our customers are being well served.