Nice article, Kisal!
Welcome to the forum, PBand! Hope you find it friendly and helpful and hope you are having fun spending the winter days planning a spring garden. I'm dreaming over the seed catalogs myself.
Something to think about for the future is succession of bloom, keeping something blooming a lot of the season. It is too late now to plant spring blooming bulbs, but fall of 2010, you might want to throw some in. It's an easy way to extend your bloom season with some crocus, daffodils, hyacinth, tulips...
Think about a color scheme. Flower beds can be just a riot of color, but IMHO they have more impact when limited say to a main color and a couple accent colors. The accent colors can be complementary or contrasting, how ever you like. My front yard is mainly all purple and yellow flowers and is very eye-catching!