  Mobile access to information is a considerable problem for many users,
especially to information found on the Web. In this paper, we explore how a
voice-controlled service, accessible by telephone, could support mobile users'
needs for refinding specific information previously found on the Web. We
outline challenges in creating such a service and describe architectural and
user interfaces issues discovered in an exploratory prototype we built called
WebContext.
  We also present the results of a study, motivated by our experience with
WebContext, to explore what people remember about information that they are
trying to refind and how they express information refinding requests in a
collaborative conversation. As part of the study, we examine how
end-usercreated Web page annotations can be used to help support mobile
information re-finding. We observed the use of URLs, page titles, and
descriptions of page contents to help identify waypoints in the search process.
Furthermore, we observed that the annotations were utilized extensively,
indicating that explicitly added context by the user can play an important role
in re-finding.
