add http://news.ycombinator.com/threads?id=your_username_here to google reader to create an rss feed from it. Then subscribe to that feed however you like to follow it and be notified of updates. yay.
damn, sorry guys, seems like "Google was not able to access this page to check for updates. This page may be unavailable or have other restrictions that prevent Google from getting updates."
However, it will not notify of comments to entries that you post but only replies to your comments correct? So it's not a complete solution unfortunately
I also use it to track new answers for 'StackOverflow' questions.
You can even 'publish' a tracker and anyone can subscribe without requiring an account.
Just created a Femtoo Tracker for this page, this URL will tell you how many comments have been posted (will get updated every 30 mins):
http://api.femtoo.com/trackers/content/?trackerKey=f24b684a9...
too cool?
"Femtoo - Reference any part of any web page by URL"