There are some UI improvements with v2, although tagging is the major new feature.
There are a number of features currently being worked on for v2.1, which is scheduled for release in about 4 weeks time. The comment system will be much improved in v2.1. Comments will be threaded and you will be able to kick comments that you like. Anonymous users will also be able to post comments.
Some ideas from my wish list for the future of the site =)
- search stories
- feedback button or link
- top rated and hot stories
-maybe with date (best of yesterday, today, last week)
- some algorithm to detect hot histories (kicks / log(days_old+1)) or something like
- some page to check the submitions of some user, or the same that now but with an option to hide the others stories