For Indigo usage instructions see this wiki article.
Indigo 7 Update: Note the Vera Bridge plugin is no longer included in the Indigo 7 installer. However, you can still download it from our GitHub repo. It should continue to work with Indigo, it just isn't as useful now that Indigo supports locks natively. Note also that controlling locks directly via Indigo is *much* more responsive than going through the bridge + Vera.