Dear Colleagues, If you are interested in participation in the Workshop on ILC Interaction Region Engineering Design, IRENG07, please note that the tentative list and scope of working groups and schedule are posted at http://www-conf.slac.stanford.edu/ireng07/ If you would like to have a guaranteed stay at SLAC Guest House, please make your reservation soon, as the reserved block of rooms will be held till July 15. The web page has information on the booking procedure. The web page with automatic registration will be rolled out very soon. In meantime you can notify LOC about your intention to participate in the Workshop and in preparatory work. Andrei on behalf of IRENG07 LOC