what are my options if my company is using me to help with outsourcing

My company is working with an outside company which will provide digital imaging and workflow. This company will receive invoices via e-mail, scan, fax, pdf or mail from out vendors and route them electronically thorough the system for approval. The invoices will be upload electronically into the system by an end user at my company. Since I have been with the company for 12 yrs and I am the manager of that area. They have included me in with the team that is managing this project. My responsibility is to provide them and the outside company with information to help them customize and build this system to meet the needs of the organization. This has been going on for the past four months. The target date is June 2012. During all of this no one has said to me what and if I will have a job after this system is implemented. My direct manager has said that she recognized that I am working hard and doing a good job but she has not confirmed or assured me that I will have a job at the end of this implementation. Other than looking for another job and hoping that I find something very soon so I can leave, what are my rights? I feel like they are using me because I know after the implementation they will be very little work left to done. Some of the clerks will definitely be laid off. Do they have a right to use me and lay me off? I am just concerned. Thanks for your response.