Twitter for our Business

We would like to utilize the new twitter platform to promote our online stores. Must be creative and understand Twitter and how to incorporate Twitter with our stores for the ability for our customers to follow up on Twitter with such things like product updates, new products, and announcements We do not understand how this works, and need help designing the Twitter site and the communications, and all aspects. We also would like to do the same for a Facebook platform where we can utilize a facebook account for our online store(s). Only the lowest bid will be considered.