Re: Can someone give me an idea of what sort of money is involved?
As they incorporated Lightning (see my previous post) that's at least one of his suggestions that they haven't rejected.
Well, OK-ish. Lightning is not exactly spectacular as a calendar client (you could say it matches the rest of TB, but that would be unfair to TB which does work rather well). It only handles URL subscriptions, not accounts, which means that you have to add a subscription for every separate calendar you have set up in the caldav account which is seriously inflexible. I can set up a new calendar on my Mac or server and my iPhone will pick it up on the next poll, whereas I will have to get the URL and import that into Lighting before it can access it. That is several levels below useful for us as we create calendars per project.