I was in contact with Dublin Bus during the development of the app. Sent them screenshots, etc. Anyone who responded thought it was a good idea, but passed me on to talk to someone else in the bureaucracy (it's a public company funded by the taxpayer).
In the end, the leads fizzled out and I didn't get written permission to use the data from Dublin Bus. I continued to keep them up to date on it, hoping that they'd even call me up on it so that we could figure something out. My objective was to get at the data cleanly without having to scrape, and also to form a relationship that might allow me to use the upcoming real-time data.
As I mentioned in the post, there was no app available for this before mine. Dublin Bus website is a mess (they've updated it in the last few months, but it's still awful) and it's particularly awkward to use on a small screen.
They're a government owned company and others have pointed out that 'data' can't have a copyright, but I'm not really sure to be honest. I suspect they're aware of it and are choosing not to act since it's benefiting their service.
I would argue that this is a different issue to what this other developer has done: He has taken my schema and my translation of the data which is my own original work.