In many styles of Aikido, randori refers to a particular kind of practice, not freestyle - that would be called jiyuwaza. In many approaches to randori, you only use kokyunage-type throws, Never joint locks, because they take way too much time in that kind of multiple-attack situation to apply.
True, true. My sensei said in his book Aikido Kyohan (plug plug) that in real fights "there was no time for nikyo, shihonage, etc." and instead opted for kata-otoshi, koshis for attack from behind, and iriminage.
[Edited by Nick on August 8, 2000 at 11:25am]