MyStack is a new hosted linklist service being provided by PubSub.com. Sort of like Blogrolling.com except for link lists.
A new twist though is that a stack can be a canned keyword search that generates links. This search runs against PubSub's search engine of blogs, newsgroups, and news feeds. This lightweight hosted Web service idea is catching on.
Here's a thought. When will indivdual weblogs morph into platforms for integrating services? Maybe that old "personal portal" idea wasn't so stupid after all. The key would be that if they were closer to writing and syndication tools, people would be come more attached and thereby more interested in pulling in services. The hard part is keeping the programming barrier to entry pretty low though.