[Koha] Koha version feature summary?

Hi, grts from Finland Europe! Ive been wondering has anybdy listed on one doc functional features of major Koha versions? I run live a experimental Koha 3.6.2. on periodicals of my 20 000 item'ish rural public library in Northern Finland. Now, I miss for my upcoming (due 1.1.2013) project reports general part a description of Koha's feature delevopment to ground my by-far-final version choice. :)) 3.2 3.3 3.4 3.5. 3.6 3.7 3.8 Any help? 3.8. and some earlier versions new features can be obtained but as far as I see it, the earlier feature specs have not been informed in any especially explicit manner. Especially from usability viewm not technical. tx in adv , from Gary