Here is the generic link for sending letters to congressperson/senator and it can be displayed to the public eyes. May be several folks writing letters to these folks that are displayed to the general public (newspaper and media I am sure will be reading these as well) will open their eyes to immigration backlogs. It will take less than two minutes to write a letter.
http://congress.org/congressorg/issuesaction/letters/
http://congress.org/congressorg/issuesaction/letters/