If somebody is interested, escort quests are usually relatively easy to implement.
Here is a list of some that might be missing:

http://www.wowhead.com/quest=5821
http://www.wowhead.com/quest=5943
http://www.wowhead.com/quest=11930
http://www.wowhead.com/quest=25393
http://www.wowhead.com/quest=25445