a slightly differnt take on this. At my church we often have concerts with live musicians includimg drummers. What i have noticed is that often the drummer will play with headphones connected up to a click track or preprogrammed drum track. This is used to keep him "true" to the timing especially if there are sequenced bits that are dropped in and out of the performance.

This has been the most effective way that i have seen where live drummers have worked well with sequenced peices.