document: Clustering for opportunistic communication We describe ongoing work on I2I , a system aimed at fostering opportunistic communication among users viewing or manipulating content on the Web and in productivity applications . Unlike previous work in which the URLs of Web resources are used to group users visiting the same resource , we present a more general framework for clustering work contexts to group users together that accounts for dynamic content and distributional properties of Web accesses which can limit the utility URL based systems . In addition , we describe a method for scaffolding asynchronous communication in the context of an ongoing task that takes into account the ephemeral nature of the location of content on the Web . The techniques we describe also nicely cover local files in progress , in addition to publicly available Web content . We present the results of several evaluations that indicate systems that use the techniques we employ may be more useful than systems that are strictly URL based .
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