Not sure if this is relevant, but in our forum, we've added in a custom BB tag [ bible ] verse-reference [ /bible ] that fetches the scripture referred to in the tag and inserts it into the post. It uses the ESV (English Standard Version), and makes use of their RSS feed - you can request specific verses/passages, up to 500 verses per request. You need to include a copyright statement on each page with the scripture. Our forum is still in development, but if you know PHP you can look here for more information:
http://www.gnpcb.org/esv/
Using their API, you could also implement a full bible search (not just retrieving passages, but also doing keyword searches, right inside your own site). See my church's web site for an example of this in action:
http://www.whitford.org.au/resources/bible-search