Here are a few things that will help it along. Under the house of reps description there should be more info on the rep's district. Where is/what does "Representative from California 37" mean. Searching by zip code would be good. Switching to a wiki back end might help -that way people can help you update the site. There's just too much info to update for a one person or a small group. Also sign-up should be less emphasized. I know you want to get people involved but these days people get turned off if they have to sigh up for a site without clear benefits. I know you can browse the site but without it but it's not clear from the start.
Good job, much fortune.