SiteScape, a provider of Web-based workflow and collaboration solutions, has signed an agreement to purchase Maynard-based Imidio, a provider of audio and Web collaboration products. The company also announced Zon, a unified instant collaboration product developed by Imidio, which is designed to unify instant messaging, teleconferencing, Web conferencing, chat, and presence into a, instant collaboration solution. Zon is intended to provide a platform for real-time collaboration for groups of employees. It integrates presence--determining who is at their desk, on the phone, or in a meeting--with Web conferencing and instant messaging. Zon is available immediately as a stand-alone product, and will be available in early 2005 as an add-on feature of SiteScape Forum. Pricing will be disclosed upon request and announced shortly.