NewsMonster: This is very well-done — a news aggregator built into Mozilla. It installs beautifully (completely within the browser), and seems to work like a charm. I’m still hooked on NewsGator, but the channels installed with NewsMonster by default are interesting enough that I’ll keep it installed just for fun.
This is also a great example of the programming that can be done inside Mozilla. My post yesterday about using Mozilla-equipped Linux machines as thin clients seems awfully smart in light of this. If you can do this for news aggregation, what could you do with Mozilla for, say, CRM?