External implementation of tags on HN

I know this is a duplicate, I feel that in this case the situation merits it. The discussion over here : http://news.ycombinator.com/item?id=1069377 : is concentrating on the idea of discovering (an approximation to) your internal HN id.

Much, much more interesting is the potential for tagging items. If just 1% of people took the time to tag things then it could become a really useful resource. It might even become my first portal to HN.

Two suggestions: Please can we have somewhere a list of used tags, and please can it not show dead items?

I have found what appears to be a bug. Putting "algorithm" as a tag to search for it returns:

    1 Computer algorithm to decipher ancient texts (reuters.com)
      (1 point) (discuss)(tag)tags: hacking algorithm
	
    2 Computer algorithm to decipher ancient texts (reuters.com)
      (2 points) (discuss)(tag)tags: hacking algorithm

The discuss links, however, go somewhere weird and apparently unrelated.