Did it has released a new free keyword suggestion tool located at http://www.did-it.com/suggest.php. They analyzed the meta tags of millions of websites to create keyword relationships between them.

While not as robust as WordTracker, this is a great tool for free!

While it may not improve your search engine rankings any there are ways to have fun with the search engine results page. If you place escape character codes in your title you can make it show up with arrows or stars on the search engine results page.

for a star use & # 9 7 3 3 with no spaces between the characters.
for an arrow use & # 9 6 5 8 with no spaces between the characters.

I actually learned this a few weeks back while reading Search Engine Yearbook 2004. You can actually use this trick with many other symbols too. Here is a post from Webmaster World about it.

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Keyword research is typically done via the following tools:

• Google Keyword Tool

• SEO Book Keyword Suggestion Tool
• Overture Search Term Suggestion tool (free)
• Google Keyword Sandbox (free) or
• Wordtracker (free trial)

Note: I later did a more in depth review of keyword research and keyword suggestion software.

recently Digital Point hacked together a free keyword research tool that uses both Overture and Wordtracker. This tool does a good job of showing the inaccuracies either tool alone may present. Here is their tool if you would like to try it...