Build us a strong FB, Twitter and LinkedIn following

Our tech startup is deep in the dev stage imminently looking at releasing our alpha. We are looking to gain a large number of twitter and LinkedIn followers as well as Facebook likes. Our goals although a little lofty are definitely attainable. (Fb: 1,500, t: 2,000 and LinkedIn 500 regionally) The target demographic is IT, Creative and Interactive Marketing professionals with a heavy emphasis on Contractors and in Minnesota, North Dakota, Wisconsin and Iowa with the vast bulk coming from Minnesota. We already have the pages built to our liking and started test driving content pushes and scheduling but have not started looking to announce publicly until next week. This is where we're looking for an expert to help. Thanks for your time! Mike