I just found a twitter search plugin for Firefox. Cool.

As many know, your non-default search providers show up by clicking a drop-down by the search box. At the bottom of this drop-down, you'll notice Manage Search Engines... link.

Click it. You'll see this.

Manage Search Engines Dialog

Notice the keyword column? Notice the Edit Keyword... button? WTF?

This Mozilla KB article explains it.

See the keywords I added above.

Typing "w Iowa" searches Wikipedia for Iowa.

Typing "t health care" searches twitter for health care.