I'm sure I will cover this topic from time to time but for now, why not read this great article by Eileen Wekler, the DC Feng Shui Home and Garden Examiner?
Another place that I have often gone to find plants to swap is the forums section of gardenweb.com. You can even swap plants through the mail with people and it is a LOT of fun to get a surprise package of plants in the mail.
