Last post I wrote about the importance of knowing about open pollinated/heirloom seeds. My lack of knowledge in the matter has given me a new area to study and a place to start from scratch. Here is a good post from a well seasoned gardener that will help explain the difference in seeds and the importance of heirloom seeds.
Down to Earth .. Raising open pollinated seeds. Consider this a 'jumping off place' as there are other links worth visiting here as well.