We were there one Easter a while ago, and other than offering transportation to local churches, I don't remember seeing a bunny or really much being done - although the restaurants may have offered some "Easter-like" foods....but it's a really nice time of year to be in Jamaica (plus you'll have a great tan and if you're from the Northeast, you'll be the envy of all your friends).
We were there last year during Easter and the entertainment staff had an Easter egg hunt. The grand prize was three free nights. There were about thirty couples running all over the grounds looking for that egg. It was really funny.