Google has released a new search engine optimization tool called The Search-Based Keyword Tool.  When it does is the search based keyword tool generates keyword and landing page ideas highly relevant and specific to your website.  Google suggests that it will help you identify additional advertising opportunities.  I suggest that you can use it for finding relevant keywords to optimize your website.

Based on your URL they display a list of relevant user queries that occurred in global searches with some frequency over the past year.  Additionally, keywords are organized by category, and when you click on a category.  You can expand it to do its subcategories.  Imagine the possibilities in finding longtail keywords.

Assuming that you have an adwords account you can add options for showing partial matches to keywords, mostly queries, competition with the parameters low medium high, and suggested bid thresholds.  This is a good way to figure out the weight of your keywords.

Thanks to Google, it is getting easier to optimize your website for search engines.