fleeting

Displays the latest results based on a twitter search. Options include setting multiple search terms, excluding terms and limiting tweets shown. Use the sidebar widget, <code><?php wp_twittersearch_feed(); ?></code> in your template or shortcode in your posts/pages: [wpts terms=twittersearch limit=5 lang=en]
<ul>
<li>This plugin requires PHP5. Contact your host if your unsure what version you have or if your stuck on PHP4.</li>
</ul>
<h3>Future Plans</h3>
<ol>
<li>Add the remaining Twitter Advanced Search options</li>
<li>Allow for multiple widgets each with its own options</li>
<li>Location based search (input a zip code and distance)</li>
<li>Add a button to the Visual Editor to add a shortcode</li>
<li>Display results from a username and tags from a post</li>
<li>Cache the result for a period of time?</li>
<li>Should the tweets display in an unordered list? divs/spans? Should you be able to choose?</li>
</ol>

WP-TwitterSearch

Displays the latest results based on a twitter search. Options include setting multiple search terms and limiting tweets shown.

Ciprian Turcu

Plugin Description: 
A widget that will enable visitors to add twitter account or return search results, with a custom number of maximum results per account/search. It’s easy to use , flexible and has multiple displays by two(so far) types of content. More will be added in future versions.. 
Update: 1.0.1 Small design issue 
Update: 1.0.2 I’ve got 1 report of a error for a code that i replaced recently with a better one.
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Advanced Twitter Widget

Widget that will enable visitors to give you/the site a virtual beer by clicking on the widget.

WP-TwitterSearch vs Advanced Twitter Widget