Dala is the name I've given my web-based feed aggregator. It started off in the distant past as a patch for the Lilina aggregator. Eventually I decided to just code up an aggregator from scratch using PHP and a home rolled MVC framework. Dala in the result. It is an acronym for Dots And Loops Aggregator.
For a while I was using it as my personal start page, largely because I found Google Reader to be so unaesthetic and clumsy a user interface. Since then I've discovered Feedly.
I still think there is a place for an open source web based aggregator like Dala, but perhaps more as a topic specific community site than a personal aggregator. You can see a demo of Dala
here.
At the moment I am in the process of porting Dala to ASP.Net. The original PHP version is certainly functional. There is no end user friendly install script at the moment, so getting it going may require some tinkering. If you want something more user friendly I'd recommend
Gregarious or
Lilina.