Via EatLocalChallenge, sign up for The Great Sunflower Project, an effort to monitor the health of bee populations. They'll send you free sunflower seeds to plant and then ask you to monitor the flowers for bees. Visit the web site for more information and to sign up.
We're in the unusual situation of having a wild bee hive less than two blocks from our house. Our yard is rife with white clover and I love leaving it long, both to enjoy the sweet scent filling the air on a sunny day, and to see the bees dancing among the abundant flowers.
Based on a recent e-newsletter, the project has had difficulties with their seed. It had a poor germination rate so they had to get replacement seed and are now ready to go.