Letizia is a user interface agent that assists a user browsing the World Wide Web. As the user operates a conventional Web browser such
as Netscape, the agent tracks user behavior and attempts to anticipate items of interest by doing concurrent, autonomous exploration of links
from the user's current position. The agent automates a browsing strategy consisting of a best-first search augmented by heuristics
inferring user interest from browsing behavior.
Great blog post about how to increase and sustain community activity. 5 steps: enabling influencers, identify advocates, enabling advocates, what's beyond?, negative feedback & the community manager