Richard MacManus writes about a list from eConsultant and offers a few markets. Among them:
# Community-building services – overlaps with local; examples: craigslist, backfence, Oodle. There is a lot more that can be done to bring local communities into the 2.0 digital lifestyle.
# Cooperative Distribution Services – e.g. BitTorrent; I’m no expert on P2P, but 3 products listed in eConsultant seems a little light to me.
# Financial Services – has plenty of contenders, but I read/hear hardly any buzz about them in the blogosphere; if you’re talking about ‘real world’ needs, finances is right near the top of the list (as opposed to blogging, organizing photos, etc)