Seeds Trust, a company that specializes in seeds for high altitude gardens and the Southwest, has a fabulous free downloadable seed saving book. You can also purchase a hard copy for $3. Very worthwhile! They offer a Seed School (now through Native Seeds/SEARCH) for a deeper learning opportunity.
Seed Savers Forum- ask the experts! The Seed Savers Forum allows you to ask experts questions about seed saving. While your at it become a member of Seed Savers Exchange and get access to thousands of varieties of vegetables, including unusual and rare varieties.
Seed Saving Chart - easy reference chart of plants by cycles, type of pollination, length of seed viability