Tim O’Reilly has compiled a set of lists. Among some of the feature requests:
# I want my phone to sync seamlessly with my address book to remember everyone I ever communicate with, not just those I explicitly add, and to use heuristics like Google does to find the top web pages to help find the most likely addresses to remember for me. Obviously, adding someone explicitly is the highest priority form of remembering, and deleting them is the highest form of forgetting, but in between, there are all kinds of interesting options: give higher priority to people I communicate with most often; give higher priority to people I respond to most quickly; give higher priority to people with whom I spend the most minutes communicating; give higher priority to people with whom I communicate using multiple methods (see point 2 below); demote people who call me and leave messages but to whom I never respond; demote people on known telemarketer lists.
# Integrate with other non-phone communication methods (e.g. email and IM, for phones that don’t support it), and use all the same metrics as in #1 above to give me an address book that reflects my true social network.
# Give me a PC-based app that lets me manage my social network (and visualize it), in much the same way that iTunes lets me manage my music, with more sophisticated controls than are easy to cram onto a handheld device.