I'm looking into playing with the concept of 'dashboards'. In one sense, a dashboard is basically a place/thing/piece of software that lets you monitor the activity in a defined area in the blink of an eye. For example, a car dashboard lets you see the speed of the car, how far the car has gone, how hard you're driving the car, the amount of fuel left, and often a lot more (air and engine temperature, fuel efficiency, tire pressures).
I feel that online dashboards will become a big thing. Some people already use sites like Google News as their "news dashboard." I guess I use my RSS aggregator for this purpose. As soon as someone links to PeterCooper.co.uk, I know about it due to my Technorati RSS watchlist. As soon as there's a new story on Slashdot, I know about it. When David blogs, I'm there. And so on.
This is all well and good, but I think there's an opening for a larger scale "dashboard" in a number of niche areas. Imagine a Web based finance dashboard. It'd have the top indicies, a number of key shares, the top 10 latest stories from the wires (with the ability to search through more), the latest posts from the blogosphere about certain companies and shares, and so on. As soon as you see a few negative blog posts about Google, you can find out what new bombshell they've just dropped and act accordingly.
So I'm working on news dashboards. I haven't got very far, but I've thrown together a really scrappy implementation of a RubyOnRails news dashboard. (It uses RSS Digest and PHP to throw multiple digests together) It's nothing like what I want eventually, but several Rails coders are using it already and it proves the concept has some worth.