An addon could be created to pull the field value for the featured field... however since its a yes/no field it stores its values in the database as "0" or "1"... so you may want to have the addon convert the 0 or 1 into something like _featured... then in your search results template do something like:
<tr class="result_row_{row_num_even_odd}{addon_feature d_check}">
Then for all your listings that are featured you would get an output of something like:
<tr class="result_row_1_featured">
<tr class="result_row_2_featured">
And your non-featured listings would still give you the normal output of:
<tr class="result_row_1">
<tr class="result_row_2">
Bookmarks