Here's where I bought my bees from:
I got the side-mount start kit, which included a book, a house, and a set of bees. Docile, non-stinging bees!
I also got the "Humblebee bumblebee" starter kit, because I see so many bumble bees in my garden and I thought it would be fun to have a nest I could peek into. Hopefully we have the non-aggressive bumble bees here!
The mason bees should be good for early spring and mid-spring pollination, especially for fruit trees. I believe the bumble bees do good work starting in late spring and on through freezing weather. Certainly they were wonderful pollinators for my tomatoes. The book I have says they really like Andromeda. Good thing I just planted two shrubs this year!
The next big job for my garden is deciding what seeds to buy! Oh, and crop rotation. I'll post my plans as soon as I figure them out!