Alexey,
1) allow to compare by exact id - e.g. I failed to compare #90 and #91 due to missing tags.
First, you can obtain login (ask any registered user to add you) and tag runs you are interested in. Second - you can do it if you enter two result ids into URL: http://harmonytest.org/diff.do?method=view&id=<id1>&id2=<id2>
2) add filtering by tags on the main page - e.g. to see only drl or only linux results.
Feature request accepted - I think there will be ~20..30 latest results on the first page and 'Search' link that will allow to search by tags, other run properties (like uploader name - old request from Tony Wu) -- Regards, Anton Luht, Intel Java & XML Engineering