I came here to say the same. Very nice idea (and I know I've needed it in the past), but it's not working terribly well currently. I have, however, installed it, and will be using it.
I was thinking of doing something like this without the GAE component, purely on-browser. Obviously your solution has many advantages, like automatic browser compatibility. Also, it exists.
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.
Would you be any more likely to click a toolbar button? If you mean finding threads automatically, wouldn't that have privacy implications as it would have to send every url you visit back to them?
Very cool. However, many times it doesn't work well for HN. I've gone straight to a site from an HN post (like this post's[0] site[1]) and it doesn't show the HN post.
Apparently everybody else knows what a bookmarklet is and how to use it. Maybe a little explanation on the landing page for the laggards among us would help your adoption rates.
Neat idea! I think this could be improved by loading the comments trough an API and showing them on the side / bottom (depending on screen resolution?), on the page itself.
I like the concept. You can also just submit it to reddit/HN - if already submitted, it shows the thread. Get the standard submission bookmarklets from:
Sorry, it was using the old API which is now taken down. I've updated it to use the new HNSearch API, so it should work well now. You can get the updated version at http://chetan51.github.com/panels/hacker/.