I like the UI for the "panels" bookmarklet mentioned by chetan51 http://chetan51.github.com/panels/hacker/
Is it open source? I'd like to help you add other sites. For instance, I'd like to have the Metafilter and BoingBoing reactions available too.
I know myself, I'll forget to click the bookmarklet...
Actually I also thought of integrating Metafilter, but they don't have JSONP api as of now.
Anyways will opensource it soon, and can integrate other sites with serverside component.
Edit: just saw this comment (https://news.ycombinator.com/item?id=4073067). That but instead of loading the page, load comments trough an API.
Now, users have some choice :)
Let's take this url as an example http://daneden.me/animate/.
With HN Thread I get one page.
With Hacker Panel I just get the submission screen.
With this bookmarklet I get all three times the page was submitted to Hacker News.
I added ;void(0) to the end of the script to fix this.