How do you monitor what people say about you or your firm on the internet?

hi Hoa, As Micheal tell you just apply on your websites or blog only but all over the internet is another subject :)
There are 4 popular ways that people on the internet talking or think about you or your company: News, Social websites, Twitter ( this is popular other than Vietnam :) ), Blogs.
In order to monitor what they are talking about you try these free tools.

1. News& Search: Google Email Alert System

You can sign up for Google Alerts quickly, easily and relatively painlessly! Using those keywords and phrases from your preliminary research, you can elect to have any instance of those keywords and phrases in combination with your brand, product or service as Google finds them online sent straight to your inbox.

For example, you are work for Woori investment, Your brand brand is often primarily searched for and referred to as “"Woori” and “Chung khoan woori”... So you can sign up to receive Google Alerts for not only your company name "Woori", but also the keyword phrase: "Chung Khoan Woori"...
Check this out: http://www.google.com/alerts

2. SocialMention
SocialMention allows you to easily track and measure what people are saying about you, your company, a new product or any topic across the web’s social media landscape in real time. SocialMention monitors 100+ social media properties directly, including Twitter, Facebook, FriendFeed, YouTube, Digg, Google, and so forth. ( Anphabe going on the list soon :) )
Check this result for Anphabe you will get the idea
http://www.socialmention.com/search?q=anphabe&t=all&btnG=Search

3. TweetDeck
To narrow down where you monitor your brand, TweetDeck offers you a simple way to view multiple conversations and searches from one location. You can use the dashboard in multiple locations such as laptop, desktop, smartphone and tablet.
Not much to talk about since twitter not yet expose in Vietnam
Check TweetDeck here: http://www.tweetdeck.com/

4. The Last Technorati for Blogs monitoring
To monitor the blogosphere for what bloggers are posting about your brand, I recommend Technorati. It’s an online tool that searches a blog directory of nearly 1.3 million blogs for all mentions of the brand or keyword/phrases that you enter in the search field.
http://technorati.com/
What are your thoughts? What tools have you considered for you to monitor your brand?