What is the significance of Sefirat Haomer - counting the omer? Does the counting only have historical significance, commemorating the weeks between the Exodus and the Giving of the Torah, or is there agricultural significance as well? Why is a public peace offering (shelamim) only brought on Shavuot, and what is the connection between Shavuot and the eighth day of the Miluim? And what is the significance of waving the Omer?