Staying current with the application and service tools you use in your enterprise, be it a personal enterprise for communicating with your family and social networks or a business enterprise providing products and services to customers, is important and one way to do that is to utilize news feeds from both service vendors and independant sources. Which is why I built the My Application Architecture category in my Bloglines account.
Eventually, this will get unwieldy because the services any enterprise uses get to be really large, especially business enterprises. So there will need to be some means of categorizing the application architecture so it is meaningful and useable. My gut tells me the way to do this is some sort of tagging or categorizing by the process the service supports, be it photo management, personal communication, or financial management.
One other thought is for storting information about both future services to follow and archival of information sources on application services that have gone along the wayside. You don't really need to follow these old application information sources, but having them around to check in on every once in a while isn't a bad idea. So, I've added an Application Archive folder to my Bloglines account and moved the FeedBlitz RSS Updates By Email tool there (I'm using Feedburner for this now).
Here's what the Application Archive folder looks like currently...