I just stumbled upon a nice site that gives information about planting gardens to specifically attract bees (native bees as well as honey bees) and offer them a habitat in which they can live. It is fairly specific to California, but a lot of the plants (with an emphasis on natives) grow well in other parts of the country.
The site is called Urban Bee Gardens and is out of Berkeley. And the photo has absolutely nothing to do with their site, but everything to do with my warped sense of humor.
That photo is awesome…