DNS Server?

A while back I remember reading (I can't remember if it was on linuxjournal.com, in an issue of LJ, freshmeat.net or somewhere else) about a DNS server where zone changes could be scheduled.

It was such that you could effectively change a record and mark it to take effect at a specific time. It would automatically reduce the TTL on any queries it answered such that they were guaranteed to expire at the time of the change so it actually made scheduling in changes a doddle.

However, no amount of searching the aforementioned sites and Google has revealed the name of this particular nameserver.

Did I dream it all or can someone point me in the right direction?

Many thanks in advance.