bbPress Search Widget plugin v1.1+ -- filters and constants for customizing and branding

bbpress-search-widget.php

<?php

/** bbPress Search Widget: Remove Search Label */
define( 'BBPSW_SEARCH_LABEL_DISPLAY', false );


add_filter( 'bbpsw_filter_label_string', 'custom_bbpsw_label_string' );
/**
 * bbPress Search Widget: Custom Search Label
 */
function custom_bbpsw_label_string() {
	return __( 'Your custom search label text', 'your-theme-textdomain' );
}


add_filter( 'bbpsw_filter_placeholder_string', 'custom_bbpsw_placeholder_string' );
/**
 * bbPress Search Widget: Custom Placeholder Text
 */
function custom_bbpsw_placeholder_string() {
	return __( 'Your custom placeholder text', 'your-theme-textdomain' );
}


add_filter( 'bbpsw_filter_search_string', 'custom_bbpsw_search_string' );
/**
 * bbPress Search Widget: Custom Search Button Text
 */
function custom_bbpsw_search_string() {
	return __( 'Your custom search button text', 'your-theme-textdomain' );
}

theme_ifeature-lite.css

/* iFeature Lite: bbPress Search Widget
----------------------------------------------------------------------------------------------------*/

#bbpsw-form-wrapper {
	height: auto !important;
}

#bbpsw-form-wrapper .searchform,
#bbpsw-form-wrapper .searchform .s {
	height: auto !important;
}

#bbpsw-form-wrapper .searchform {
	border-radius: 0 !important;
	-moz-border-radius: 0 !important;
	-webkit-border-radius: 0 !important;
	box-shadow: 0 0 0 #222222 inset !important;
	-moz-box-shadow: 0 0 0 #222222 inset !important;
	-webkit-box-shadow: 0 0 0 #222222 inset !important;
	width: auto !important;
}

#bbpsw-form-wrapper .searchform .s {
	background: #f5f5f5;
	padding: 3px;
	max-width: 100% !important;
}

#bbpsw-form-wrapper .searchform .searchsubmit {
	display: inline-block;
}

#bbpsw-form-wrapper .bbpsw-label {
	margin-bottom: -15px !important;
}

Note: The above codes work with plugin version 1.1 or higher!

Extended explanation can be found at the plugin's page "FAQ" section at the bottom:
http://wordpress.org/extend/plugins/bbpress-search-widget/faq/

Download "bbPress Search Widget" plugin at wordpress.org:
http://wordpress.org/extend/plugins/bbpress-search-widget/