Really cool idea to open this data up to the masses.

A few ideas:

Maybe you could do some sort of "introduction" video or tutorial so that a new visitor can tell what the site is about, use cases, where to find help, etc.

Could you maybe create a master list of "issue" keywords and then scrape the legislative text for these keywords, and then use this to tag each bill? Tags would help with discovery.

*Similarly, scraping the data for Legislator names would also be interesting.