Can't you just search the keywords? I wonder how useful it would be given that the information (tech articles, such as rails2.1, best features in jQuery1.0,...) will be out-of-date as time goes.
I think what's useful is various tools if they are still alive. That's why I want to build a toolbox which collects all the useful tools.
1. You can download the dataset using http://hn.algolia.com/api. Mind the rate-limits, though.
2. This has already been done quite a few times by various apps, most prominently here: http://algorithmia.com/demo/hn (http://blog.algorithmia.com/post/86295023534/algorithmic-tag...)