komlenic posted a comment link to a list of keyword bookmarks for Firefox over at adot. I've already used it to update my amazon search bookmark, as my old one was broken.

For those of you not familiar with keyword bookmarks, they are a powerful way of quickly searching for information from your address bar. For example, if I type "imdb Finding Nemo", my browser will take me to the imdb search results for Finding Nemo. If I type "amazon Beowulf", it will take me to the Amazon search results for Beowulf. The one I use most often is "bm python", which takes me to all the python-related links I have in my del.icio.us bookmarks.

There's a tutorial for using keyword bookmarks here.